Add .gitignore and remove compiled artifacts from version control

- Add comprehensive .gitignore for Java/Groovy project
- Remove compiled .class files and .jar from git tracking
- Keep only source code and configuration files in version control
- Build artifacts will be generated during compilation process

+# Compiled classes and build artifacts
+build/
+classes/
+*.class
+*.jar
+
+# IDE files
+.idea/
+*.iml
+*.ipr
+*.iws
+.vscode/
+.settings/
+.project
+.classpath
+
+# Logs
+*.log
+logs/
+
+# Temporary files
+*.tmp
+*.temp
+*.swp
+*.swo
+*~
+
+# OS generated files
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
+
+# Gradle
+.gradle/
+gradlew
+gradlew.bat
+
+# Runtime
+runtime/
+log/
\ No newline at end of file

-Manifest-Version: 1.0
-