Refactor: Extract shared module from pwrap.py and cwrap.py to remove code duplication

[GaneshPatil7517]

demo/pwrap.py (129 lines) and demo/cwrap.py (124 lines) share ~95% identical code:

• Same API key loading logic (lines 12-20)
• Same yuyu loading logic
• Same name1/name2 loading logic
• Same init value loading logic
• Same polling/retry loop structure
• Same bare except: error handling

The only difference is the HTTP endpoint URL (/pm/ vs /ctl/) and which variable is input vs output. These should be refactored into a single shared module with the endpoint as a parameter.

[GaneshPatil7517]

hey @pradeeban Sir can i solve this......