Highlight reference types directive in TypeScript (#11039)

Before:

<img width="443" alt="image"
src="https://github.com/zed-industries/zed/assets/45585937/a8037edb-ed5b-4b12-92b4-2d409442ad4b">


After:

<img width="429" alt="image"
src="https://github.com/zed-industries/zed/assets/45585937/1fd66523-d667-4041-952f-c1125e7feab9">


Release Notes:

- Add typescript reference types directive highlighted(#11001)
f72cf2afe3d1y committed on 4/29/2024, 8:38:53 AM· committed by GitHubparent8a79535
1 file changedLine totals unavailable