chore: migrate from Poetry to UV package manager

[ppppangu]

Description

This PR implements the migration from Poetry to UV package manager as requested in issue #139. UV provides significantly faster dependency resolution and installation compared to Poetry while maintaining full compatibility with the existing pyproject.toml format.

Changes Made

• ✅ Updated CONTRIBUTING.md with UV commands replacing Poetry commands
• ✅ Modified Docker configuration (.container/Dockerfile and README) to use UV throughout
• ✅ Updated documentation files (docs/quickstart.mdx) for development setup
• ✅ Updated example documentation to use UV commands instead of pip
• ✅ Generated uv.lock file to replace deleted poetry.lock
• ✅ Optimized GitHub Actions workflow to remove redundant installation steps
• ✅ Verified all dependencies install and import correctly

Testing

• ✅ Successfully ran uv sync --all-extras
• ✅ Verified OASIS package imports correctly: import oasis
• ✅ Confirmed all main dependencies are available: pandas, igraph, camel, neo4j
• ✅ Tested development tools work with uv run: pytest, pre-commit

Checklist

• I have read the CONTRIBUTION guide (required)
• I have linked this PR to an issue using the Development section on the right sidebar or by adding Fixes #139 in the PR description (required)
• I have checked if any dependencies need to be added or updated in pyproject.toml
• I have updated the tests accordingly (required for a bug fix or a new feature)
• I have updated the documentation if needed

Fixes #139

[ppppangu]

This PR focuses on the essential Poetry-to-UV migration. Demo scripts and UV usage examples are intentionally excluded from this version to maintain a focused scope. These can be addressed in future PRs if needed. thanks!