feat: add reusable fork type catalog

[redxzeta]

Closes #6

Summary

• Added a shared fork-type catalog in apps/web/src/lib/forkTypes.ts with structured entries.
• Each entry includes stable id, display name, description, emoji icon, and whether it is a functional integration.
• Marked Git Fork as functional; all non-Git types are parody-only.
• Added focused unit tests for functional/parody split, lookup behavior, and minimum non-Git coverage.

Validation

• Attempted bun run test apps/web/src/lib/forkTypes.test.ts, but bun is not available in this environment (bun: command not found).

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