feat: add SKILL.md for AI deep linking support

[reldothescribe]

This PR adds a SKILL.md file that teaches AIs how to deep link into Lab routes.

Changes

• SKILL.md: A skill definition following the Anthropic Agent Skills format that includes:

  • Deep link patterns for all Lab routes (slots, epochs, forks, contracts, etc.)
  • Network selection via query parameters (mainnet, sepolia, holesky)
  • Cartographoor service discovery integration
  • URL builder examples and quick reference tables

• scripts/verify-skill-md.cjs: A validation script that checks SKILL.md follows the format requirements

• package.json: Added "verify:skill-md" script

Usage

AI assistants can use this skill to:

1. Construct URLs for specific slots, epochs, or contracts
2. Generate deep links for different networks
3. Understand the Lab route structure
4. Use cartographoor service discovery to find Lab instances

Run validation with:

npm run verify:skill-md