feat(Puya-PY32F040): add OTA dual-project codegen template

Co-authored-by: Cursor <cursoragent@cursor.com>

tools/pack_app.bat

@@ -0,0 +1,13 @@
+@echo off
+REM Pack App project into Output\app_package.zip
+REM App/ is fully self-contained (own Drivers/ + Shared/).
+REM Keep this file pure ASCII - cmd parses .bat in GBK.
+setlocal
+cd /d "%~dp0\.."
+set PY=python
+where python >nul 2>nul || set PY=py
+%PY% tools\pack.py app
+if errorlevel 1 (
+    echo [ERR] pack failed - python not found in PATH?
+)
+endlocal