Refactor cleanup scripts and remove deprecated files

- Deleted obsolete test result files from cleanup/test_results.
- Removed the cleanup_create_3branch_setup.sh script, consolidating its functionality into other scripts.
- Deleted cleanup_create_branch_and_backup.bat and cleanup_create_branch_and_backup.sh scripts, streamlining the cleanup process.
- Removed cleanup_revert.sh, cleanup_run_tests.sh, and cleanup_scan_candidates.sh scripts to simplify the cleanup workflow.
- Updated __main__.py to import main_gui from gui_tk instead of gui, reflecting changes in the GUI backend.

Author: monkcoders

.gitignore

@@ -16,6 +16,7 @@ parts/
 sdist/
 var/
 wheels/
+.venv/
 share/python-wheels/
 *.egg-info/
 .installed.cfg