chore: remove benchmark suite from repo — keep as independent local project

Author: xycld

.claude/commands/bench-ai.md

@@ -28,20 +28,13 @@
 !i18n/**
 !.github/
 !.github/**
-!.claude/
-!.claude/commands/
-!.claude/commands/**
-!benchmark/
-!benchmark/**
 
 # Within allowed dirs, re-ignore all hidden directories then whitelist specific ones
 **/.*/
 !**/.svp/
 !**/.svp/**
 !.github/
 !.github/**
-!.claude/
-!.claude/**
 
 # Re-ignore generated/temp files within allowed dirs
 tests/e2e/report-*