codemirror: Fix search query syntax highlighting
Created by: fkling
Fixes #35587 (closed)
I didn't port the colors correctly, especially the dark mode ones.
Instead of trying to consolidate the classes with the same color as much as possible I went through the Monaco colors and mapped them 1:1.
Test plan
Inspected regex syntax highlighting in dark mode.
App preview:
Check out the client app preview documentation to learn more.