refactor: restructure repository with separate backend and frontend directories

- Move Java backend to backend/ directory
- Create frontend/ directory for TypeScript TUI and future WebUI
- Update .gitignore for Node.js and worktrees
- Update README.md with new repository structure
- Copy documentation to backend/

src/test/resources/application-test.yml

@@ -1,25 +0,0 @@
-spring:
-  datasource:
-    url: jdbc:h2:mem:testdb
-    driver-class-name: org.h2.Driver
-    username: sa
-    password:
-
-  jpa:
-    database-platform: org.hibernate.dialect.H2Dialect
-    hibernate:
-      ddl-auto: create-drop
-    show-sql: true
-
-  liquibase:
-    enabled: false  # Use Hibernate for test schema
-
-jwt:
-  secret: TestSecretKeyForUnitTestsMin256BitsLongForHS256AlgorithmSecurity
-  expiration: 3600000  # 1 hour for tests
-  refresh-expiration: 7200000  # 2 hours for tests
-
-logging:
-  level:
-    root: INFO
-    de.effigenix: DEBUG