LSP Document Content Sync

[thecoolwinter]

Description

Note

Requires #1879 to be merged, based on that branch. This will look like it's a massive change until that is merged.
Requires CodeEditApp/CodeEditSourceEditor#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.
• Fixed a bug where a temporary tab replacing an existing temporary tab did not have it's file opened by the editor manager.

Related Issues

• N/A

Checklist

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

Screenshots

N/A