feat(cli): add /compress command for manual conversation context compression

Introduced a new command "/compress" to the CLI, allowing users to manually trigger context compression on the current conversation. The method checks for sufficient conversation history and active agent status before performing compression, providing feedback on the number of messages and tokens before and after the operation. Updated command documentation accordingly.

hermes_cli/commands.py

@@ -26,6 +26,7 @@ COMMANDS = {
     "/skills": "Search, install, inspect, or manage skills from online registries",
     "/platforms": "Show gateway/messaging platform status",
     "/verbose": "Cycle tool progress display: off → new → all → verbose",
+    "/compress": "Manually compress conversation context (flush memories + summarize)",
     "/quit": "Exit the CLI (also: /exit, /q)",
 }