feat(package): PyPI packaging standardization and automated OIDC release workflow

[MichalRedm]

Summary

• Dynamic Single-Source Versioning: Configured dynamic = ["version"] in pyproject.toml targeting src/stride/__init__.py as the authoritative source of truth.
• PyPI Discoverability & Metadata: Added comprehensive keywords and populated [project.urls] navigation tables (Homepage, Documentation, Repository, Issues, Changelog).
• PyPI-Safe Assets & Readme Updates: Replaced relative image and license references in README.md with absolute URLs to ensure correct rendering on pypi.org, and added PyPI badges along with PyPI quickstart installation instructions.
• Keep a Changelog Baseline: Introduced CHANGELOG.md following Semantic Versioning and Keep a Changelog specifications for release 0.1.0.
• Automated OIDC Release Workflow: Created .github/workflows/release.yml for PyPI and TestPyPI publishing via OpenID Connect (OIDC) Trusted Publishing (pypa/gh-action-pypi-publish), including automated distribution build verification via twine check --strict and a TestPyPI smoke testing job.

Motivation

Prepares STRIDE for public release on the Python Package Index (PyPI) under the package name stride-xai, establishing reproducible build validation and credential-free OIDC publishing automation. Resolves #10.

Key Changes

1. Packaging & Metadata (pyproject.toml)

• Switched version to dynamic configuration (dynamic = ["version"]).
• Added package navigation URLs ([project.urls]) and search keywords.
• Added build and twine to [project.optional-dependencies] dev.

2. Documentation & Assets (README.md, CHANGELOG.md)

• Converted assets/pipeline.png to an absolute raw GitHub URL.
• Converted license links to absolute GitHub URLs.
• Added PyPI version and supported Python version badges.
• Documented pip install stride-xai and optional extras in the Installation section.
• Added structured CHANGELOG.md documenting features for version 0.1.0.

3. CI/CD Release Automation (.github/workflows/release.yml)

• Trigger on published GitHub Releases and manual dispatch (workflow_dispatch).
• Build sdist and wheel with PEP 517 build backend.
• Validate metadata and long description with twine check --strict.
• OIDC Trusted Publishing integration via pypa/gh-action-pypi-publish@release/v1 for both testpypi and pypi environments.
• Isolated container smoke test for TestPyPI installations.

4. Agent Context Maintenance (.agents/project_context.md)

• Marked Issue release: PyPI Packaging, Metadata Standardization, and Automated OIDC Trusted Publishing Workflow #10 as completed in the repository status roadmap.

Verification

• Distribution build (python -m build) succeeded with clean sdist and wheel artifacts containing src/stride/py.typed
• twine check --strict dist/* passed with zero warnings or errors
• ruff check . passed with 0 errors
• ruff format --check . passed cleanly across 106 files
• python -m unittest discover tests passed with 28 tests passing and 0 failures