update the disclaimer, add sections on stable and experimental modes,…

[lastmjs]

… get rid of extension installation

Contributor

• Breaking changes enumerated in the release issue
• New documentation enumerated in the release issue
• Code has been declaratized
• Error handling beautiful (no unwraps or expects etc)
• Code tested thoroughly
• All new functions have JSDoc/Rustdoc comments
• Related issues have been linked and all tasks have been completed or made into separate issues

Reviewer

• Breaking changes enumerated in the release issue
• New documentation enumerated in the release issue
• Code has been declaratized
• Error handling beautiful (no unwraps or expects etc)
• Code tested thoroughly
• All new functions have JSDoc/Rustdoc comments
• Related issues have been linked and all tasks have been completed or made into separate issues