LSP Document Content Sync

[thecoolwinter]

Description

[!NOTE] Requires https://github.com/CodeEditApp/CodeEdit/pull/1879 to be merged, based on that branch. This will look like it's a massive change until that is merged. Requires https://github.com/CodeEditApp/CodeEditSourceEditor/pull/265 to be merged as it provides the required APIs to make this work.

Changes:

• Implements Language Server document content syncing.
• Adds a LSPContentCoordinator which manages forwarding content change notifications to the correct language server.
• The language server has been updated to send the correct document sync notifications depending on what the language server supports.

Misc related changes:

• Fixed bugs with the cursor position label, uses the tab change subject instead of a variety of notification sources. Also split it into two views for ease in maintenance.

Related Issues

• N/A

Checklist

• [x] I read and understood the contributing guide as well as the code of conduct
• [x] The issues this PR addresses are related to each other
• [x] My changes generate no new warnings
• [x] My code builds and runs on my machine
• [x] My changes are all related to the related issue above
• [x] I documented my code

Screenshots

N/A

[thecoolwinter]

This is almost good to go. Only one thing needs to be changed.

Also while these changes are great, some of them seem unrelated to the main focus and might be better in a separate PR. I get that it's faster to put everything in one, but it makes reviewing and testing a bit harder (and I need to work on this too 😅). Thanks!

Yeah this one was particularly tangled with a few things since I did #1892 on this branch and had to split it off to make it its own PR. I left a few things here that's my bad.