Add files subcommand for file manipulation

[Davidyz]

• vectorcode files ls command lists all files in a collection;
• vectorcode files rm command (followed by file paths) removes embeddings for files from a collection.
• after rm, remove the collection if it's empty
• add the files subcommand to the LSP server
• create codecompanion tools for files_ls and files_rm

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.76%. Comparing base (d57bea4) to head (c78170f).

Additional details and impacted files

@@ Coverage Diff @@## main #230 +/- ##
==========================================
+ Coverage 99.75% 99.76% +0.01% 
==========================================
Files 21 24 +3 Lines 1627 1715 +88 ==========================================
+ Hits 1623 1711 +88 
Misses 4 4 

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[rodionlim]

Looks really good, thank you for the changes. Would it be helpful to also have this as a codecompanion tool, so we can list out the files directly in the chat buffer?

[Davidyz]

Looks really good, thank you for the changes. Would it be helpful to also have this as a codecompanion tool, so we can list out the files directly in the chat buffer?

Yes I'll do it, but for a slightly different reason: I want to be able to remove files from the database from within the chat. I'll need to also update the LSP server before adding the new tools.