feat: add /lfg command for full autonomous engineering workflow

- Orchestrates: plan → deepen-plan → work → review → resolve todos → test-browser → feature-video
- Uses ralph-loop for autonomous completion
- Migrated from local command
- Updated to use /test-browser instead of /playwright-test

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

plugins/compound-engineering/commands/lfg.md

@@ -0,0 +1,19 @@
+---
+name: lfg
+description: Full autonomous engineering workflow
+argument-hint: "[feature description]"
+---
+
+Run these slash commands in order. Do not do anything else.
+
+1. `/ralph-wiggum:ralph-loop "finish all slash commands" --completion-promise "DONE"`
+2. `/workflows:plan $ARGUMENTS`
+3. `/compound-engineering:deepen-plan`
+4. `/workflows:work`
+5. `/workflows:review`
+6. `/compound-engineering:resolve_todo_parallel`
+7. `/compound-engineering:test-browser`
+8. `/compound-engineering:feature-video`
+9. Output `<promise>DONE</promise>` when video is in PR
+
+Start with step 1 now.