Initial commit: LMS microservices scaffold

- Gradle multi-module: libs/{common-http,security-jwt,markdown,test-support},
  services/{identity,academic,progress,gateway}, web (Thymeleaf+htmx)
- identity-service: JWT auth (RSA), accounts, students, groups, enrollment,
  import from XLSX/CSV, credentials export, password reset
- academic-service: lab import from JSON/zip (markdown + YAML + variants),
  levels, API
- progress-service: schema for student levels and variant assignments
- gateway: Spring Cloud Gateway, JWT validation, route propagation
- web: Server-side UI with flex/footer layout, light/dark theme toggle,
  admin dashboard, groups CRUD, student portal placeholder
- docker-compose: PostgreSQL 18
- Tests: identity smoke test with Testcontainers

gradle.properties

@@ -0,0 +1,8 @@
+# Enable the build cache to save time by reusing outputs produced by other successful builds.
+# https://docs.gradle.org/current/userguide/build_cache.html
+org.gradle.caching=true
+
+# Enable the configuration cache to reuse the build configuration and enable parallel task execution.
+# (Note that some plugins may not yet be compatible with the configuration cache.)
+# https://docs.gradle.org/current/userguide/configuration_cache.html
+org.gradle.configuration-cache=true