fix(rpc): update help text to show 'rpc' instead of 'rpc-manager'

Complete the command rename by updating the help text in the
Infrastructure section to reflect the new shorter command name.

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

Co-Authored-By: Claude <[email protected]>

Author: 0xrinegade

src/clparse.rs

@@ -44,7 +44,7 @@ COMMAND CATEGORIES:
     realtime             Real-time blockchain data sync daemon
     
   Infrastructure:
-    rpc-manager          Manage RPC nodes (local/remote)
+    rpc                  Manage RPC nodes (local/remote)
     deploy               Deploy eBPF programs to SVM networks
     mount                Manage folder mounts for microVMs