feat: 2D Array Operations app (AWT/Swing) with stats, search, and matrix math\n\n- Rename classes to Java conventions\n- Input validation for sizes and ranges\n- Matrix multiply dimension checks\n- Cleaned comments and added README\n- Added .gitignore

Author: maxwell-hauser

.gitignore

@@ -0,0 +1,19 @@
+# Java build artifacts
+*.class
+*.jar
+*.war
+*.ear
+
+# IDE files
+.vscode/
+.idea/
+*.iml
+.classpath
+.project
+.settings/
+
+# Build dirs
+bin/
+build/
+out/
+target/