chore(release): bump version to v0.9.4

- Updated version number in index.js
- Added docstrings to several classes
- Improved error handling and messages
- Updated changelog with new version
- Added more detailed comments in code

Author: taj54

CHANGELOG.md

@@ -9,7 +9,7 @@ All notable changes for each version of the Ambient Music extension.
 ### Added
 
 - add changelog generation
-- version bumpupdated this  taj54/[email protected]
+- version bumpupdated this taj54/[email protected]
 
 ### Changed