fix: remove build artifacts from spring-boot template and improve gitignore

- Remove committed Maven build artifacts (target/ directory)
- Add Java/Maven/Gradle patterns to root .gitignore
- Add .gitignore to spring-boot template to prevent future artifacts
- Tests now use --no-open flag to prevent browser opening

Author: kaifcoder

.gitignore

@@ -147,4 +147,18 @@ vite.config.ts.timestamp-*
 .DS_Store
 .vscode/*
 .idea/
-test-workspace/
+test-workspace/
+
+# Java / Maven / Gradle build artifacts
+target/
+*.class
+*.jar
+!**/src/**/*.jar
+*.war
+*.ear
+build/
+.gradle/
+bin/
+.settings/
+.classpath
+.project

package-lock.json

@@ -0,0 +1,18 @@
+# Maven build artifacts
+target/
+*.class
+*.jar
+*.war
+*.ear
+
+# IDE files
+.idea/
+.vscode/
+.settings/
+.classpath
+.project
+*.iml
+
+# OS files
+.DS_Store
+Thumbs.db