feat(cli): show random tip on new session start (#8225)

Add a 'tip of the day' feature that displays a random one-liner about
Hermes Agent features on every new session — CLI startup, /clear, /new,
and gateway /new across all messaging platforms.

- New hermes_cli/tips.py module with 210 curated tips covering slash
  commands, keybindings, CLI flags, config options, tools, gateway
  platforms, profiles, sessions, memory, skills, cron, voice, security,
  and more
- CLI: tips display in skin-aware dim gold color after the welcome line
- Gateway: tips append to the /new and /reset response on all platforms
- Fully wrapped in try/except — tips are non-critical and never break
  startup or reset

Display format (CLI):
  ✦ Tip: /btw <question> asks a quick side question without tools or history.

Display format (gateway):
  ✨ Session reset! Starting fresh.
  ✦ Tip: hermes -c resumes your most recent CLI session.

gateway/run.py

@@ -3965,9 +3965,16 @@ class GatewayRunner:
         except Exception:
             pass
 
+        # Append a random tip to the reset message
+        try:
+            from hermes_cli.tips import get_random_tip
+            _tip_line = f"\n✦ Tip: {get_random_tip()}"
+        except Exception:
+            _tip_line = ""
+
         if session_info:
-            return f"{header}\n\n{session_info}"
-        return header
+            return f"{header}\n\n{session_info}{_tip_line}"
+        return f"{header}{_tip_line}"
     
     async def _handle_profile_command(self, event: MessageEvent) -> str:
         """Handle /profile — show active profile name and home directory."""