Add sw cache and link features (#691)

* Add sw cache and link features

* Add right click context menu handling

* push linted changes

* Make TS Happy Again

* Switch to contextmenu event and event loop skipping to account for touch long-press

* Use pointerup to catch all cases, including context menu invocation.

* fully skip a frame to ensure the browser has popped the context menu and locked in contextual state of the element

* Update web feature API to export a single polyfill activation function

* move function block

* Skip SW install when install location missing

* Adding code comments

* Add tsdoc

* Fixing lint issues