[llvm] [llvm-cov] Coverage report HTML UI to jump between uncovered parts of code (PR #95662)

[NAKAMURA Takumi via llvm-commits]

chapuni wrote:

Could we split out `.css` and `.js` to individual include files in the future? (I don't think we should do right now)

https://github.com/llvm/llvm-project/pull/95662