Add contributor sorting option to compile_contributors.py (#32549)
### Description
- Add `--sort-by` to order the contributor summary by contribution count
or contributor name.
- Preserve contribution-count ordering as the default, with a
deterministic contributor-name tie-breaker.
- Add focused unit tests for both sorting modes.
- Add claude to bot list
### Motivation and Context
Release-note contributor acknowledgments should be alphabetized, while
existing workflows can continue sorting by contribution count.
### Testing
- `.venv\Scripts\python.exe tools\python\test_compile_contributors.py`
- `.venv\Scripts\python.exe -m ruff check --config pyproject.toml
tools/python/compile_contributors.py
tools/python/test_compile_contributors.py`
- `.venv\Scripts\python.exe -m ruff format --check --config
pyproject.toml tools/python/compile_contributors.py
tools/python/test_compile_contributors.py`