fix: word-boundary routing + debug route command (#31)

- Replace substring matching with word-boundary regex in route_request()
- "fix the bug" now correctly routes to coder
- Multi-word patterns match if all words appear (any order)
- Add "timmy route" CLI command for debugging routing
- Add route_request_with_match() for pattern visibility
- Expand routing keywords in agents.yaml
- 22 new routing tests, all passing

src/timmy/cli.py

@@ -325,5 +325,19 @@ def voice(
     loop.run()
 
 
+@app.command()
+def route(
+    message: str = typer.Argument(..., help="Message to route"),
+):
+    """Show which agent would handle a message (debug routing)."""
+    from timmy.agents.loader import route_request_with_match
+
+    agent_id, matched_pattern = route_request_with_match(message)
+    if agent_id:
+        typer.echo(f"→ {agent_id} (matched: {matched_pattern})")
+    else:
+        typer.echo("→ orchestrator (no pattern match)")
+
+
 def main():
     app()