nff: add parsing and CST inspection commands

README.md

@@ -94,6 +94,25 @@ nff lint config.nft --style-warnings=false --best-practices=false
 nff lint config.nft --debug
 ```
 
+### Parsing and CST Inspection
+
+```bash
+# Parse and display CST structure for debugging
+nff parse /etc/nftables.conf
+
+# Show tree structure with indentation
+nff parse config.nft --tree
+
+# Show detailed node information
+nff parse config.nft --verbose
+
+# Combined tree and verbose output
+nff parse config.nft --tree --verbose
+
+# Debug output with tokens and CST validation
+nff parse config.nft --debug
+```
+
 ## Architecture
 
 ### Processing Pipeline