chore: migrate project tooling from Poetry to uv

[GangGreenTemperTatum]

Summary

• migrate project metadata and locking from Poetry to PEP 621 + uv
• replace Poetry-based CI, docs, publish, and Docker workflows with uv-based equivalents
• add a 3 day release-age guardrail in both uv and Renovate
• replace poetry.lock with uv.lock

Validation

• uv lock
• uv sync --all-extras --group dev --group docs --python 3.12
• uv run ruff check dyana
• uv run mypy --ignore-missing-imports --no-error-summary dyana
• uv run pytest dyana
• uv run mkdocs build --strict
• uv build

Notes

• the fast-json extra is now constrained to Linux x86_64, matching the published cysimdjson wheel support
• loader-specific requirements files were left unchanged in this migration

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Generated Summary:

Summary of changes from Poetry to UV build system for package management and CI/CD.

• Replaced instances of Poetry with UV in the GitHub Actions workflows to streamline dependency management and installation.
• Added new match manager for pep621 and updated existing rules in the Renovate configuration to handle uv properly.
• Updated the Dockerfile to use uv for environment setup and package installation instead of Poetry.
• Modified pyproject.toml to align with the new dependency management strategy, incorporating the changes to section formatting and project details.
• Enhanced README with instructions for setting up the local development environment using uv.

Potential impact includes:

• Improved build and CI performance due to reduced installation overhead.
• Simplified developer onboarding process with clearer setup instructions.
• Better management of dependencies and versions as part of the environment setup.

This summary was generated with ❤️ by rigging