feat: Initial clean release of CHM

packages/app-clipper/content_scripts/README.md

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+# Updating Readability
+
+Because of the way content scripts are loaded, we need to manually copy the whole Readability files here. That should be fine since they rarely change.
+
+The files to update are:
+
+- Readability.js
+- Readability-readerable.js (for the function isProbablyReaderable)
+- JSDOMParser.js
+
+When updating, **make sure you add the commit and version number at the top of each file**.