chore: update gitignore to exclude build outputs, IDE files, and temporary directories

.gitignore

@@ -1 +1,80 @@
+# ==========================================
+# Maven / Build Outputs
+# ==========================================
+target/
+**/target/
+*.class
+
+# Package Files
+*.jar
+*.war
+*.ear
+*.nar
+*.zip
+*.tar.gz
+*.rar
+
+# Maven Wrapper & status
+.mvn/timing.properties
+.mvn/wrapper/maven-wrapper.jar
+
+# ==========================================
+# Logs
+# ==========================================
+*.log
+logs/
+**/logs/
+*.log.*
+
+# ==========================================
+# IntelliJ IDEA
+# ==========================================
+.idea/
+*.iml
+*.iws
+*.ipr
+out/
+
+# ==========================================
+# Eclipse
+# ==========================================
+.project
+.classpath
+.settings/
+.metadata
+bin/
+tmp/
+*.tmp
+*.bak
+*.swp
+*~.nib
+local.properties
+
+# ==========================================
+# Visual Studio Code
+# ==========================================
+.vscode/
+*.code-workspace
+
+# ==========================================
+# Operating System Files
+# ==========================================
+# macOS
+.DS_Store
+.AppleDouble
+.LSOverride
+Icon?
+._*
+
+# Windows
+Thumbs.db
+ehthumbs.db
+Desktop.ini
+$RECYCLE.BIN/
+
+# ==========================================
+# Custom / Temporary Files
+# ==========================================
 test
+upload/
+temp/