chore: added initial README doc

Signed-off-by: Adrian Riobo Lorenzo <[email protected]>

README.md

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+# ci-definitions
+
+This repository contains several specs to define ci actions used within the building process of Openshift Local. The logic on each action is encapsulated as a container which improve their portability.
+
+## release
+
+The ci-definitions is a group of actions, as so the release / versioning is tied to each action on the project. Each action contains a file named `release-info` which holds the inforamtion for the release of the specific action.
+
+The following snippet shows how to release new version for a specific ci action (i.e crc-builder v1.0.0):
+
+```bash
+# Create a branch, branch will NOT be pushed
+git checkout -b b-crc-builder-v1.0.0
+# Change the version on the release-info file for the ci action
+sed ... (TBC)
+# Generate the tasks with the new version
+make crc-builder-tkn-create
+# Commit the cut for the ci action
+git commit -s -m "chore: cut crc-builder v1.0.0"
+# Create the tag
+git tag crc-builder-v1.0.0
+# Here the gh builder flow for the ci action will create oci image and bundle with tekton tasks
+git push upstream crc-builder-v1.0.0
+# Change version on release-info to next version 
+```