Test typescript syntax highlighting with Tree Sitter

[alexr00]

Refs: #210475

• anyOS @ulugbekna
• anyOS @aiday-mar
• anyOS @rzhao271

Complexity: 3

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Setup:

• "editor.experimental.preferTreeSitter.typescript": true

Tree sitter based syntax highlighting for typescript should be pretty close to textmate now. If you see any color differences, please include a code snippet I can repro with.

Testing:

• Open several typescript files. Verify that they are all colored correctly.
• Make various edits to the files. Verify that the colors stay correct.
• Open a really big file and start scrolling around as soon as it opens. Verify that the viewport stays colored, even when the rest of the file isn't done yet.