perf(linter): parse ts-directive manually

[Devin-Yeung]

parse ts directive manually instead of using regex, mentioned in #741 (comment). I roughly check the benchmark results on vscode repo, seems that the performance changes is very subtle, do we need to test on other repos?

[Run on main branch]
Total: 406.88ms
   Time |     % | Rule
 406.88 | 100.0% | ban-ts-comment

Finished in 2235ms on 4508 files with 1 rules using 2 threads.
Found 46 warnings and 0 errors.

[Run on PR branch]
Rule timings in milliseconds:
Total: 404.24ms
   Time |     % | Rule
 404.24 | 100.0% | ban-ts-comment

Finished in 2223ms on 4508 files with 1 rules using 2 threads.
Found 46 warnings and 0 errors.

[codspeed-hq]

CodSpeed Performance Report

Merging #845 will not alter performance

_{Comparing Devin-Yeung:perf-ban-ts-comment (b6a6fdc) with main (73be3ea)}

Summary

✅ 17 untouched benchmarks

[Boshen]

Thank you! These small numbers add up, every optimization counts.