chore: archive planning docs under admin/planning and remove root cruft

[accesswatch]

Root directory professionalization:

• Move completed and in-flight planning documents out of the root into
  admin/planning/: DEPLOYMENT_ASSESSMENT.md, REVIEW-2026-07-02.md,
  REORG-PLAN.md, SHIP-CHECKLIST.md, plus docs/SITE-IA.md and
  docs/TOOLING-INVENTORY.md (planning inputs, not curriculum). Relative
  links between them rewritten for the new location.
• Add admin/planning/README.md: consolidated initiative index with status
  (shipped vs in flight), shipped-initiative summaries, and the rule that
  new planning docs belong there, not the root.
• Delete true junk: datetime (empty stray file), 'GitHub Learning
  Room.docx' (February draft superseded by docs/), COMING_SOON.md
  (pre-launch teaser), github/index.html (redirect stub never deployed;
  Pages serves only the html/ artifact).
• Remove the stale html/ outputs for moved and deleted pages; html/
  regenerated (396 files).

No references to the moved or deleted files exist outside the archive
itself. golden.md (project north star) and work.md (generated) untouched.

Co-Authored-By: Claude Fable 5 noreply@anthropic.com

[github-actions]

Peer Review Assigned

Hi @accesswatch! Your PR has been automatically paired with @taylorarndt for peer review.

For @taylorarndt:

This is a great opportunity to practice code review skills! Here's what to look for:

Content Quality:

• Does the change accomplish what the issue describes?
• Is the writing clear and helpful?
• Are there any typos or grammar issues?

Accessibility:

• Proper heading hierarchy (H1 → H2 → H3, no skips)?
• Descriptive link text (not "click here")?
• Alt text on images?
• [TODO] markers removed?

Documentation:

• Code blocks are properly formatted?
• Tables have headers?
• References/links work correctly?

Review Guidelines:

• Be kind and constructive
• Suggest improvements, don't just point out problems
• Ask questions if something is unclear
• Approve when ready or request changes with explanation

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[Copilot]

Pull request overview

This PR “professionalizes” the repository root by moving planning/initiative documents into admin/planning/, removing obsolete root artifacts, and updating the committed html/ build outputs (including the site search index) to match the new structure.

Changes:

• Archived planning docs under admin/planning/ (and added an index/README for the archive).
• Removed obsolete root content (e.g., COMING_SOON.md, github/index.html) and regenerated html/ outputs accordingly.
• Updated html/search-index.json and planning HTML pages to reflect new URLs/paths.

Reviewed changes

Copilot reviewed 16 out of 21 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
html/search-index.json	Updates search index entries to remove deleted/moved pages and add admin/planning/* pages.
html/COMING_SOON.html	Removes generated HTML for deleted “Coming Soon” page.
html/admin/planning/TOOLING-INVENTORY.html	Updates generated planning page paths/links for new location.
html/admin/planning/SITE-IA.html	Updates generated planning page paths/links for new location.
html/admin/planning/SHIP-CHECKLIST.html	Updates generated planning page paths/links for new location.
html/admin/planning/REVIEW-2026-07-02.html	Updates generated planning page paths/links for new location.
html/admin/planning/REORG-PLAN.html	Updates generated planning page paths/links for new location.
html/admin/planning/DEPLOYMENT_ASSESSMENT.html	Updates generated planning page paths/links for new location.
html/admin/planning/README.html	Adds generated HTML for the planning archive README/index content.
html/admin/planning/index.html	Adds generated HTML index page for admin/planning/.
github/index.html	Removes unused redirect stub file.
datetime	Removes stray root file.
COMING_SOON.md	Deletes obsolete root “Coming Soon” markdown page.
admin/planning/TOOLING-INVENTORY.md	Fixes some relative links after moving planning docs under admin/planning/.
admin/planning/SITE-IA.md	Fixes some relative links after moving planning docs under admin/planning/.
admin/planning/SHIP-CHECKLIST.md	Updates cross-links to refer to new planning doc locations.
admin/planning/REVIEW-2026-07-02.md	Adds the July 2 ops review document under the planning archive.
admin/planning/REORG-PLAN.md	Updates authoritative-source links to point at docs/ from the new location.
admin/planning/README.md	Adds a consolidated planning archive index and status overview.
admin/planning/DEPLOYMENT_ASSESSMENT.md	Adds the deployment assessment document under the planning archive.

Comments suppressed due to low confidence (3)

admin/planning/SITE-IA.md:275

• The “Episode map schema” link is broken after moving this document under admin/planning/; the schema file lives in docs/EPISODE-MAP-SCHEMA.json, so this relative link should point to ../../docs/EPISODE-MAP-SCHEMA.json.
  admin/planning/TOOLING-INVENTORY.md:162
• The “Episode map schema” link is currently relative to admin/planning/, but the schema lives in docs/EPISODE-MAP-SCHEMA.json. Update this to ../../docs/EPISODE-MAP-SCHEMA.json so the link works in-repo.
  admin/planning/TOOLING-INVENTORY.md:170
• This section-level source map still links to EPISODE-MAP-SCHEMA.json as if it were in admin/planning/. The schema file is in docs/, so this should also use ../../docs/EPISODE-MAP-SCHEMA.json.