packaging: pyproject.toml (pip install) + .editorconfig + .clang-format

[ZacharyZcR]

Summary

Two quality-of-life additions for a 16k-star project:

1. Python packaging (pip install colibri-engine)

pip install -e .              # CLI + serve (stdlib only, no heavy deps)
pip install -e .[convert]     # adds numpy + huggingface_hub
pip install -e .[oracle]      # adds torch + transformers + safetensors
pip install -e .[bench]       # adds tokenizers + datasets

• pyproject.toml with setuptools backend, version from colibri/_version.py
• colibri/ package: thin wrapper delegating to the existing c/coli script
• Console script entry point: coli command works after pip install
• Engine binary is still native C (not pip-distributed) — the CLI auto-detects it

2. Code style definitions

• .editorconfig: consistent indent/charset/EOL for all editors
• .clang-format: LLVM-based, 120 columns, single-line short functions — matches the existing engine style without reformatting everything

These are definitions only — no pre-commit hook or CI enforcement yet (that can be a follow-up once the team agrees on whether to enforce).

Test plan

• pip install -e . → Successfully installed colibri-engine-1.0.0
• python3 -c "import colibri; print(colibri.__version__)" → 1.0.0
• python3 -m colibri.cli → banner prints
• Existing tests unaffected

🐦 Generated with Claude Code