feat: Add Claude Code plugin for natural language device control

[chrismerck]

Summary

• Add Claude Code plugin manifest (.claude-plugin/plugin.json)
• Add core skill (skills/assistant/SKILL.md) with common operations
• Add 12 reference documents covering all Bond API domains:
  • Discovery & authentication
  • Ceiling fan actions (speed, breeze, direction, light)
  • Motorized shades actions (position, tilt, TDBU)
  • Light actions (brightness, color, color temp)
  • Fireplace/heater actions (flame, heat, timer)
  • Device types reference
  • Groups & scenes
  • Schedules
  • Mate channels (MT-1500)
  • System operations
  • RF/IR signals
  • Troubleshooting
• Update CLAUDE.md with plugin documentation

Test Plan

• Plugin JSON validates
• Curl examples tested against simulator (KXXXXXX12345)
• End-to-end test: list devices, execute action, verify state
• Install plugin via /plugin add and test natural language commands

🤖 Generated with Claude Code

-- Claude