Clean up repository: remove temporary and duplicate files

Removed temporary files and documentation drafts:

1. Documentation cleanup:
   - Removed PR_COMMENT.txt (draft, info moved to IMPLEMENTATION_NOTES.md)
   - Removed TESTING_GUIDE.md (consolidated into README.md)
   - Kept IMPLEMENTATION_NOTES.md (main technical documentation)

2. Removed duplicate build artifacts:
   - build/CMakeCache 2.txt
   - build/Makefile 2
   - build/live 2/* (duplicate live555 build directories)

3. Removed test files and scripts:
   - test/test_O.mp4 (temporary test file)
   - test_h264.sh, test_mjpeg.sh (testing scripts)
   - Added /test directory to .gitignore

4. Updated .gitignore:
   - Added /test to ignore test files directory

Repository now contains only:
- Source code
- Single build directory (build/)
- Core documentation (README.md, IMPLEMENTATION_NOTES.md, SECURITY.md)
- Configuration files

This makes the repository cleaner and easier to navigate.

Author: 350d

.gitignore

@@ -17,5 +17,6 @@ live555-latest.tar.gz
 # OS
 .DS_Store
 /tmp
+/test
 .cursor
 .ssh