Milestone 0: Repo scaffolding, governance, and CI/release automation

[jeffpatton1971]

Milestone

Closes Milestone 0.0.0 foundation work: repo structure, ADR governance, and workflows.

Issues closed

• Fixes Repository skeleton + solution scaffolding #1 — Repository skeleton + solution scaffolding
• Fixes ADRs committed and indexed #2 — ADRs committed and indexed (adds ADR-014)
• Fixes Quickstart documentation added #3 — Quickstart documentation added
• Fixes Root README updated for HelpGenerator #4 — Root README updated for HelpGenerator
• Fixes CONTRIBUTING updated for milestone workflow + ADR discipline #5 — CONTRIBUTING updated for milestone workflow + ADR discipline (ADR-014 governance)
• Fixes Protect main branch and document governance #6 — Protect main branch and document governance (docs + policy)
• Fixes Update PR test workflow to include milestone branches #7 — PR test workflow includes milestone branches
• Fixes Update build workflow to pack preview artifacts only (no publish) #8 — Build workflow packs preview artifacts only (no publish)
• Fixes Update release workflow for milestone-close release (lean release) #9 — Release workflow: milestone-close, lean, with guardrail (milestone title == version)
• Fixes Add Docs PR workflow triggered after release #10 — Docs PR workflow triggered after release
• Fixes Normalize repo Action variables #11 — Normalize repo Action variables (DOTNET_VERSION, PROJECT_NAME)
• Fixes Add CODEOWNERS file and enable Code Owner review enforcement #12 — Add CODEOWNERS file + enforce Code Owner review
• Fixes Configure Branch Protection Policy for main #13 — Configure branch protection policy checklist for main

Summary of changes

• Standardized repo layout (src/, tests/, docs/, examples/)
• ADR contract baseline + governance ADR (ADR-014)
• Branching/release governance documented and enforced via workflows
• CI ready for milestone branches; release notes milestone-driven
• Docs automation runs post-release via PR (no direct pushes to main)

Verification checklist

• PR checks run on milestone/** and main
• build.yml packs preview artifacts and uploads them (no publishing)
• release.yml fails if milestone title != Directory.Build.props version
• docs-pr.yml triggers after “New Release” and opens PR when changes exist
• notifications.yml posts on successful release
• CODEOWNERS present and Code Owner review can be enforced
• CONTRIBUTING + ADR index links resolve

Notes / Follow-ups

• PSGallery publishing intentionally deferred until module packaging exists.
• Docs generation step is stubbed until HelpGenerator can generate docs.