Develop implementation of .github protocol

[senyo888]

Summary

Type

• Fix
• Feature
• [ x] Documentation
• UI Gallery
• [ x] Maintenance

Checks

• [ x] PR targets develop.
• [ x] Tested in Home Assistant, or testing notes explain why not.
• [ x] Restart/config flow checked where relevant.
• [ x] Ran humidity_intelligence.refresh_ui or refreshed dashboards where UI output changed.
• [ x] Docs/changelog updated where needed.
• [ x] No private entity IDs, secrets, addresses, or personal data included.
• [ x] HACS/custom integration metadata still looks correct.

UI Gallery submissions

• Uses /ui-gallery/<card-id>/.
• Includes README.md, YAML, and preview.png.
• Preserves canonical Humidity Intelligence backend entities/helpers.