feat: Initialize Spring Boot project with user authentication

- Add Maven Wrapper for easier project setup
- Create pom.xml with Spring Boot dependencies for web, data JPA, and security
- Implement main application class RestUserAuthApplication
- Configure security settings with SecurityConfig class
- Create AuthController for user authentication and registration
- Implement UserController to retrieve current user information
- Define DTOs for authentication requests and responses
- Create User and Role models for user management
- Implement UserRepository for database interactions
- Add JWT authentication filter and token provider for secure API access
- Create CustomUserDetailsService for loading user-specific data
- Configure application properties for database and JWT settings
- Add basic test class for application context loading
- Include HTTP request examples for user registration and login in tests

.gitignore

@@ -0,0 +1,33 @@
+HELP.md
+target/
+.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/