chore: update docs and manifests for monorepo

[ChuckBuilds]

Summary

Follow-up to monorepo migration PR (#13):

• Delete outdated guides (PLUGIN_REGISTRY_SETUP_GUIDE, REGISTRY_TEMPLATE_GUIDE, AUTOMATED_REGISTRY_GUIDE, SETUP_TOKEN)
• Rewrite .cursorrules and SUBMISSION.md for monorepo workflow
• Update all plugin READMEs: replace git clone with Plugin Store install
• Clean up all manifest.json: remove old repo URLs, point to monorepo
• Add pre-commit hook (scripts/pre-commit) for auto-syncing plugins.json
• plugins.json auto-updated by hook (hello-world, hockey, soccer, olympics versions synced)

Test plan

• python update_registry.py --dry-run shows all plugins up to date
• grep -r 'github.com/ChuckBuilds/ledmatrix-[^p]' plugins/ returns no results

🤖 Generated with Claude Code

Summary by CodeRabbit

• New Features

  • Introduced automated registry synchronization to streamline plugin updates.
  • Added dual submission pathways for plugin developers: monorepo or independent repository options.

• Documentation

  • Simplified and reorganized plugin development and submission documentation.
  • Updated installation instructions for improved clarity and consistency across plugins.

• Updates

  • Streamlined plugin installation workflows to emphasize the Plugin Store method.
  • Bumped versions for select plugins (news, odds-ticker).

[coderabbitai]

Caution

Review failed

The pull request is closed.

📝 Walkthrough

Walkthrough

The PR transitions from a manual registry update workflow to an automated pre-commit hook-based system, consolidates registry documentation into a simplified monorepo-centric workflow, removes the download_url_template field from plugin manifests, updates plugin installation instructions to reference the plugin store, and adds a new pre-commit automation script.

Changes

Cohort / File(s)	Summary
Documentation Restructuring .cursorrules, SUBMISSION.md	Rebrands workflow from plugin version management to monorepo-centric structure; replaces linear submission process with dual-path options (monorepo vs. external repository) and simplifies release procedures.
Deprecated Registry Guides AUTOMATED_REGISTRY_GUIDE.md, REGISTRY_TEMPLATE_GUIDE.md, SETUP_TOKEN.md, docs/PLUGIN_REGISTRY_SETUP_GUIDE.md	Removes extensive documentation covering automated registry updates, template-based URL patterns, token setup, and comprehensive registry setup procedures (~871 lines deleted).
Pre-Commit Automation Setup CLAUDE.md, README.md, scripts/pre-commit	Introduces automated pre-commit hook to handle registry updates; new bash script triggers update_registry.py when manifest.json changes are staged; documentation updated to reflect hook-based workflow instead of manual registry runs.
Plugin Manifest Updates (Template Removal) plugins/baseball-scoreboard/manifest.json, plugins/calendar/manifest.json, plugins/christmas-countdown/manifest.json, plugins/clock-simple/manifest.json, plugins/football-scoreboard/manifest.json, plugins/hockey-scoreboard/manifest.json, plugins/ledmatrix-music/manifest.json, plugins/ledmatrix-weather/manifest.json, plugins/mqtt-notifications/manifest.json, plugins/of-the-day/manifest.json, plugins/olympics/manifest.json, plugins/soccer-scoreboard/manifest.json, plugins/static-image/manifest.json, plugins/text-display/manifest.json, plugins/youtube-stats/manifest.json	Systematically removes download_url_template field across 15 plugins; some include minor formatting normalization of array fields.
Plugin Manifest Updates (Structural) plugins/basketball-scoreboard/manifest.json, plugins/countdown/manifest.json, plugins/hello-world/manifest.json, plugins/ledmatrix-flights/manifest.json, plugins/ledmatrix-stocks/manifest.json	Adds root-level version field, reformats arrays to multi-line representation, updates homepage/website URLs to ledmatrix-plugins repository paths, adds display_modes and entry point metadata.
Plugin Manifest Updates (Version Bumps) plugins/news/manifest.json, plugins/odds-ticker/manifest.json, plugins/stock-news/manifest.json	Bumps latest versions (news and odds-ticker to 1.0.3), removes download_url fields, updates release dates, adds intermediate version entries (1.0.2).
Plugin Installation Documentation plugins/7-segment-clock/README.md, plugins/countdown/README.md, plugins/ledmatrix-flights/README.md, plugins/olympics/README.md	Replaces direct repository cloning with Plugin Store installation as recommended path; updates dependency paths to reflect monorepo structure (e.g., plugin-repos/ directories); removes git clone steps.
Registry Metadata plugins.json	Updates last_updated timestamps and bumps latest_version for news and odds-ticker plugins (1.0.2 → 1.0.3).
Logic Enhancement plugins/stock-news/manager.py	Wraps update_interval retrieval in try/except to safely coerce to int; falls back to 300 if conversion fails, preventing crashes from non-integer configuration values.
Cleanup plugins/countdown/plan.md	Removes internal planning document describing countdown plugin implementation roadmap.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

Poem

🐰 The registry hops with glee,
Pre-commit hooks set plugins free,
No templates needed, just the code,
Down the monorepo's cleaner road!
Manifests streamlined, workflows bright—
The automation feels just right! 🎉

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feat/monorepo-migration

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