welcome.py fixed to greet only new users. timezone plugin added.

plugins/help.py

@@ -527,7 +527,7 @@ Search Exploit-DB for security vulnerabilities and exploits. Returns detailed in
 
 </details>
 
-<details><summary><strong>🤖 Funguy Bot AI Commands</strong></summary>
+<!--<details><summary><strong>🤖 Funguy Bot AI Commands</strong></summary>
 <p>
 <strong>Creative & Writing</strong>: !write, !script, !author, !poem, !rap, !story, !comic, !motiv, !debate, !crit, !litcrit<br>
 <strong>Technical</strong>: !tech, !dev, !py, !php, !regex, !math, !web, !it, !security, !ai, !ml, !data, !game, !gaming<br>
@@ -542,7 +542,7 @@ Search Exploit-DB for security vulnerabilities and exploits. Returns detailed in
 
 <em>Each AI command uses specialized prompts optimized for different domains and interfaces with local AI models. Consult ai.json</em>
 </p>
-</details>
+</details>-->
 
 <details><summary>🌟 <strong>Funguy Bot Credits</strong></summary>
 <p>