Add verbose debug option to control detailed debug output level

• Added VERBOSE env var & CLI flag
• Implemented verbose_debug() function
• Added verbose option to splash screen
• Reduced default debug output length
• Modified LLM debug logging behavior

.env.example

@@ -18,6 +18,7 @@
 
 ### Logging level
 LOG_LEVEL=INFO
+VERBOSE=False
 
 ### Optional Timeout
 TIMEOUT=300