Add build-installer.bat at repo root for one-click installer build

Wraps installer/build-installer.ps1 with -NoProfile and -ExecutionPolicy
Bypass so a double-click works without PowerShell config tweaks. Pauses
at the end so the user sees the ISCC output even when launched from
Explorer. Forwards %* for `-ISCC <path>` overrides.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

build-installer.bat

@@ -0,0 +1,26 @@
+@echo off
+REM Wrapper pour lancer la creation de l'installeur Inno Setup.
+REM Pre-requis :
+REM   - .NET 8 SDK
+REM   - Inno Setup 6 (installe par defaut dans C:\Program Files (x86)\Inno Setup 6)
+REM
+REM Usage : double-clic sur ce fichier, ou en cmd : build-installer.bat
+REM
+REM Si Inno Setup est installe ailleurs, lance directement le .ps1 :
+REM   powershell -ExecutionPolicy Bypass -File installer\build-installer.ps1 -ISCC "C:\Chemin\ISCC.exe"
+
+setlocal
+set "SCRIPT_DIR=%~dp0"
+
+powershell -NoProfile -ExecutionPolicy Bypass -File "%SCRIPT_DIR%installer\build-installer.ps1" %*
+set "EXITCODE=%ERRORLEVEL%"
+
+echo.
+if %EXITCODE% NEQ 0 (
+    echo [ECHEC] Le build de l'installeur a echoue avec le code %EXITCODE%.
+) else (
+    echo [OK] Installeur genere avec succes.
+)
+echo.
+pause
+endlocal & exit /b %EXITCODE%