feat(w1): maven skeleton + CI scaffold

- Parent POM: de.platesoft:plate-auth-parent with ${revision} CI-friendly versioning
- plate-auth-starter module: Spring Boot 4.1.0 starter deps (web, jpa, security, validation, jwt, flyway, envers)
- @platesoft/auth npm package skeleton: tsup bundler, conditional exports, TypeScript strict
- Gitea Actions: ci.yml (on push/PR) + release.yml (on v* tag)
- distributionManagement pointing to Gitea Package Registry (Maven + npm)
- Apache-2.0 LICENSE, README with quickstart, CHANGELOG, .editorconfig, .gitignore
- pnpm workspace with packages/auth
- Maven BUILD SUCCESS verified locally

.gitignore

@@ -0,0 +1,42 @@
+# Java
+target/
+*.class
+*.jar
+*.war
+*.ear
+.flattened-pom.xml
+
+# IDE
+.idea/
+*.iml
+.vscode/
+.project
+.classpath
+.settings/
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Gradle (if ever)
+.gradle/
+build/
+
+# Node / npm
+node_modules/
+dist/
+packages/auth/dist/
+*.tgz
+
+# Environment
+.env
+.env.local
+.env.*.local
+
+# Logs
+*.log
+logs/
+
+# Test output
+test-results/
+coverage/