build: align uv project configuration

[aoirint]

Warning

This pull request was created with assistance from LLMs.

Summary

• Align pyproject.toml with the uv project structure used in aoirint/comfyui_docker.
• Set requires-python to ==3.10.*, disable package installation with [tool.uv] package = false, and add exclude-newer = "P7D".
• Rename the PyTorch index to pytorch-cu118 and refresh uv.lock for the new uv options metadata.
• Expand .gitignore with local agent worktree/reference ignores and the pinned Python.gitignore template while preserving this repository's project-specific paths.
• Align the README Requirements section with the aoirint/comfyui_docker environment guidance.

Related Issues

• Refs https://github.com/aoirint/comfyui_docker/blob/745a6a033b2269fa6f6b2fc400fada67807f215e/pyproject.toml
• Refs https://github.com/aoirint/comfyui_docker/blob/745a6a033b2269fa6f6b2fc400fada67807f215e/.gitignore
• Refs https://github.com/aoirint/comfyui_docker/blob/745a6a033b2269fa6f6b2fc400fada67807f215e/README.md

Notes for reviewers

AI disclosure

Codex helped inspect the working-tree diff, exclude an accidental worktree gitlink from the PR scope, run verification, adapt the .gitignore source structure and README Requirements guidance to this repository, and draft this pull request body.

Testing

Automated checks

• uv lock --check
• uv sync --frozen --only-group ci
• git diff --cached --check
• git diff --check
• git check-ignore -v .agents/worktrees/add-agent-guidance .agents/references/example .venv .python-version cache work base_model

Not run

• Additional checks for the README Requirements follow-up; documentation-only update.