Clean up debugging tools: Remove Chinese versions and Unicode characters

- Delete Chinese version files:
  - DEBUG_GUIDE.md, README_PRODUCTION_DEBUG.md
  - build_matching_vmlinux.sh, production_kernel_debug.md
  - quick_symbol_check.sh, setup_kernel_debug.sh, setup_kgdb.sh

- Update English version files (remove emoji/Unicode):
  - build_vmlinux.sh: Clean ASCII-only version
  - production_debug_guide.md: Complete English guide
  - quick_env_check.sh: Environment assessment script
  - README.md: Usage documentation

- All files now use pure ASCII characters
- Only English versions remain in test directory
- Code comments and output use English only

Author: harrison001