Add syntax highlighting to compact format output

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

Author: k4cper-g

README.md

@@ -55,7 +55,7 @@ envelope = cup.snapshot_raw()
 
 Output:
 
-```
+```bash
 # CUP 0.1.0 | windows | 2560x1440
 # app: Spotify
 # 63 nodes (280 before pruning)