docs: Lefthand Sidebar Navigation Redwood release notes

Translates https://openedx.atlassian.net/wiki/spaces/OEPM/pages/4139024391/Sidebar+Navigation+-+Product+Release+Notes
into RST for the product release notes

source/community/release_notes/redwood/dev_op_release_notes.rst

@@ -118,6 +118,7 @@ Enabling Studio Course Search
       or in the `#wg-product-core
       <https://openedx.slack.com/archives/C057J2D1WU9>`_ Slack channel.
 
+.. _redwood-enable-sidebar:
 
 Courseware Sidebar
 ==================

source/community/release_notes/redwood/sidebar_nav.rst

@@ -1,4 +1,169 @@
 Sidebar Navigation Release Notes (Redwood)
-==========================================
+##########################################
 
-https://openedx.atlassian.net/wiki/spaces/OEPM/pages/4139024391/Sidebar+Navigation+-+Product+Release+Notes
+The Product, Design, and Engineering Teams at Western Governor's University,
+Raccoon Gang, and Axim Collaborative are thrilled to offer users the opportunity
+to try out a new method for navigating course content on the Open edX platform!
+With the Redwood Release, site operators can choose to enable sidebar navigation
+for courses on their instance, giving learners and course delivery teams a new
+method for making their way through course content. Site operators should see
+:ref:`redwood-enable-sidebar` for more detail.
+
+While we're excited to share this new feature with the community, it's important
+to note that this beta version contains a few known issues that we're actively
+working to resolve in a future release. We encourage anyone who tries out
+sidebar navigation to let us know if they discover any additional bugs while
+using it. With the community's help, we can aim to make this the best navigation
+experience it can be. 
+
+.. note::
+
+    Known issues with sidebar navigation include:
+
+    * When a member of the course delivery team updates the name of a course
+      unit, the unit name updates at the top of the unit page, but does not
+      update in the sidebar navigation.
+    * When using content groups in a course, the sidebar navigation does not
+      hide hidden units when a staff user views the course as a content group
+      using the masquerading feature. Content groups work as expected for real
+      learners in content groups. Staff can masquerade as an individual user in
+      a specific content group to view how a member of the content group
+      actually sees the course and the sidebar.
+    * Course sections, subsections, and unit names may appear as missing from
+      the sidebar navigation in sections that include content that has yet to be
+      published.
+
+
+What is sidebar navigation?
+***************************
+
+Overview
+========
+
+The new navigation experience allows learners to navigate through course
+material linearly or non-linearly via a new UI element on the side of the page
+that displays the user's current course section, subsection, and unit.
+
+   .. image:: /_images/release_notes/redwood/LSN_Screenshot1.png
+      :align: center
+
+With sidebar navigation enabled, learners will still be able to navigate the
+course linearly by using the Next or Previous buttons above and below course
+content.
+
+   .. image:: /_images/release_notes/redwood/LSN_Screenshot2.png
+      :align: center
+
+Additionally, learners can easily navigate the course non-linearly without
+having to go to the Course Outline page. Learners can click on any unit in the
+sidebar to view that unit. The sidebar displays both the unit name and an icon
+indicating the type of content in that unit. The idea is to give the learner a
+fuller sense of what content exists where in the course, so that they can
+navigate it in a way that makes sense for them.
+
+   .. image:: /_images/release_notes/redwood/LSN_Screenshot3.png
+      :align: center
+      :height: 350
+
+
+Learners can explore the contents of a subsection by clicking on any collapsed
+subsection heading to expand and view the units within.
+
+   .. image:: /_images/release_notes/redwood/LSN_Screenshot4.png
+      :align: center
+      :height: 350
+
+The subsection heading expands when it is clicked to display its units.
+
+   .. image:: /_images/release_notes/redwood/LSN_Screenshot5.png
+      :align: center
+      :height: 450
+
+
+If a learner wants to `view to a unit in another section of the course`_, they can
+click on the back button in the upper corner of the sidebar to view all sections
+in a course.
+
+   .. image:: /_images/release_notes/redwood/LSN_Screenshot6.png
+      :align: center
+      :height: 350
+
+After, they will see all sections.
+
+   .. image:: /_images/release_notes/redwood/LSN_Screenshot7.png
+      :align: center
+      :height: 350
+
+The learner can then click on any other section to view its contents.
+
+   .. image:: /_images/release_notes/redwood/LSN_Screenshot8.png
+      :align: center
+      :height: 350
+
+Although the learner is not currently viewing a unit in this module, they are
+still able to view its contents.
+
+   .. image:: /_images/release_notes/redwood/LSN_Screenshot9.png
+      :align: center
+      :height: 350
+
+
+Collapsing and expanding the sidebar navigation
+===============================================
+
+The learner can easily `collapse the sidebar navigation`_ at any time to view the
+course content in a full page format by clicking the collapse button in the
+upper corner of the sidebar.
+
+   .. image:: /_images/release_notes/redwood/LSN_Screenshot10.png
+      :align: center
+
+The learner can revisit the sidebar navigation at any time by clicking the
+expand button in the upper corner of the page.
+
+   .. image:: /_images/release_notes/redwood/LSN_Screenshot11.png
+      :align: center
+
+As the learner advances through the course, the expanded or collapsed state of
+the sidebar remains the same until the learner changes it.
+
+Viewing completed and in-progress items
+=======================================
+
+When a learner completes a course unit, the icon next to the unit name in the
+sidebar navigation updates to indicate that it was completed.
+
+   .. image:: /_images/release_notes/redwood/LSN_Screenshot12.png
+      :align: center
+      :height: 350
+
+The icon next to the subsection name updates to a checkmark icon when a learner
+has completed all units in a subsection.
+
+   .. image:: /_images/release_notes/redwood/LSN_Screenshot13.png
+      :align: center
+      :height: 350
+
+Similar to a completed the subsection, the icon next to the section name updates
+to a checkmark icon once the learner has completed all subsections in the
+section.
+
+   .. image:: /_images/release_notes/redwood/LSN_Screenshot14.png
+      :align: center
+      :height: 450
+
+In addition to completions, in-progress work is indicated on the sidebar
+navigation for course sections and subsections. Once a unit is completed in a
+section or subsection, the icon next to the section or subsection name is
+updated to reflect the rough amount completed.
+
+   .. image:: /_images/release_notes/redwood/LSN_Screenshot15.png
+      :align: center
+      :height: 450
+
+These in-progress icons serve to convey to the learner what sections or
+subsections they have in-progress as well as how much content they've completed
+for each section or subsection at a glance.
+
+.. _view to a unit in another section of the course: https://openedx.atlassian.net/wiki/spaces/OEPM/pages/4264263692/How-to+View+course+sections+from+the+navigation+sidebar
+.. _collapse the sidebar navigation: https://openedx.atlassian.net/wiki/spaces/OEPM/pages/4264722448/How-to+Collapse+and+expand+the+navigation+sidebar