Add DearPyGUI observer/server UI and demo launcher

startdemo.bat

@@ -0,0 +1,14 @@
+@echo off
+setlocal
+
+set "ROOT=%~dp0"
+set "PY_SCRIPT=%ROOT%startdemo.py"
+
+if not exist "%PY_SCRIPT%" (
+    echo Script non trovato: "%PY_SCRIPT%"
+    exit /b 1
+)
+
+python "%PY_SCRIPT%"
+set "EXIT_CODE=%ERRORLEVEL%"
+exit /b %EXIT_CODE%