Build self-contained Windows JAR release

scripts/start-release.bat

@@ -0,0 +1,21 @@
+@echo off
+chcp 65001 >nul
+setlocal
+cd /d "%~dp0"
+
+set "JAVA_BIN=%~dp0runtime\bin\java.exe"
+set "APP_JAR=%~dp0@APP_JAR@"
+
+if not exist "%JAVA_BIN%" (
+    echo [ERROR] Bundled Java runtime is missing: %JAVA_BIN%
+    pause
+    exit /b 1
+)
+if not exist "%APP_JAR%" (
+    echo [ERROR] WorkUtils JAR is missing: %APP_JAR%
+    pause
+    exit /b 1
+)
+
+"%JAVA_BIN%" -Dfile.encoding=UTF-8 "-Dworkutils.home=%~dp0" -jar "%APP_JAR%" %*
+if errorlevel 1 pause