feat(prd-5): add dedicated claude-bot user for Forgejo

- Add bot_email action input for custom git commit email on Forgejo
- Update claude.yml to use CLAUDE_BOT_TOKEN with bot_id/bot_name/bot_email
- Update git-config.ts to use provided email over noreply format
- Add "Dedicated Bot User" setup guide to docs/forgejo.md
- Update CLAUDE.md with bot identity documentation

Infrastructure (done outside code):
- claude-bot user created (ID 48, non-admin, with avatar)
- Claude team with write access in all 12 orgs
- CLAUDE_BOT_TOKEN org-level secret in all 12 orgs

Progress: ~85% complete - pending E2E validation after merge

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.forgejo/workflows/claude.yml

@@ -40,6 +40,7 @@ jobs:
           github_token: ${{ secrets.CLAUDE_BOT_TOKEN }}
           bot_id: "48"
           bot_name: "claude-bot"
+          bot_email: "claude@wxs.ro"
           platform: "forgejo"
         env:
           ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}