adding shared ruff config, pre-commit hooks, and makefile for python linting

[sfc-gh-swalia]

Adds shared Python linting and formatting infrastructure for the project. Currently, 3 of 7 Python packages have ruff configured with inconsistent settings (different line lengths, different rule sets), while 4 packages have no linting at all. This PR establishes a single source of truth for code style, opt-in local tooling, and contributor guidance.

File added

1. ruff.toml — shared config (line-length 120, target py311, rules: E/F/I/UP/W)
2. .pre-commit-config.yaml — opt-in ruff hooks for local auto-formatting
3. Makefile — make lint / make format / make format-check targets
4. CONTRIBUTING.md — new "Development Setup" section with instructions for Python, Go, and Java

• Does not modify or reformat any existing Python source code
• Does not add CI enforcement (that will be a follow-up PR)
• Does not touch Java or Go tooling
• Discussed on dev@ossie.apache.org link

---

Rationale:

1. line-length = 120: 2 of 3 existing configs already use this
2. target-version = py311: our lowest common Python version
3. Rules: E (pycodestyle errors), F (pyflakes - catches real bugs like unused imports, undefined names), I (isort - consistent import order), UP (pyupgrade - modernize syntax), W (warnings)
4. E501 ignored because ruff format handles line wrapping
5. No opinion-heavy style rules - intentionally conservative

Checklist

Documentation

• CONTRIBUTING.md is updated if the contribution process changed

Compliance

• ASF license headers are present on all new source files

[sfc-gh-swalia]

@jbonofre @khush-bhatia Looking for your feedback!