Prepare Providers Documentation (AI-driven)

This skill replaces the manual commit-by-commit classification step that the release manager normally performs when running breeze release-management prepare-provider-documentation. Instead of asking the release manager to type d/b/f/x/m/s/v for each commit, the skill drives the classification itself — inspecting every PR (with extra care for potentially breaking changes), scoping multi-provider PRs to the slice that touched the current provider, and asking the release manager only when genuinely uncertain.

The skill keeps the existing breeze tooling as the source of truth for template generation. Claude only owns the classification + version bump + changelog entries; everything else (__init__.py, README.rst, pyproject.toml, conf.py, get_provider_info.py, index.rst) is still regenerated by breeze release-management prepare-provider-documentation --reapply-templates-only.