Refactor: Multi-module Maven project structure

- Restructured to multi-module Maven project (bootstrap + launcher)
- Removed duplicate code (launcher/launcher/ with JCEF)
- Added JavaFX modules to lib/javafx in ZIP
- Added JRE 21 to lib/jre21 in ZIP
- Fixed Bootstrap with UTF-8 encoding and JavaFX module-path
- Fixed JAR naming (zernmclauncher.jar)
- Added Windows build configuration (ZernMC-win-*.zip)
- Fixed version parsing for -any, -alpha, -beta suffixes

.gitignore

@@ -2,6 +2,8 @@ logs/
 __pycache__/
 ./.venv/
 launcher/target
+bootstrap/target
+src/target
 server/builds
 server/packs
 server/data
@@ -9,5 +11,4 @@ jre
 .vscode
 dependency-reduced-pom.xml
 OpenJDK21U-jre_x64_windows_hotspot_21.0.6_7.zip
-telegram-bot/
-.env
+telegram-bot/