refactor: remove obsolete resource download and installer endpoints

- Deleted the `POST /resources/get/{dataFolder?}` and `GET /resources/get-installer` endpoints as part of the architectural shift towards simplified resource management.
- Removed associated methods and configurations, including `ResourcesService.GetEncryptedResource`, `ResourcesService.GetInstaller`, and related properties in `ResourcesConfig`.
- Cleaned up environment variables and configuration files to reflect the removal of installer-related settings.
- Eliminated the `GetResourceRequest` DTO and its validator, along with the `WrongResourceName` error code.
- Updated documentation to clarify the changes in resource handling and the retirement of per-user file encryption.

Co-authored-by: Cursor <cursoragent@cursor.com>

docker-compose.test.yml

@@ -32,8 +32,6 @@ services:
       ConnectionStrings__AzaionDbAdmin: "Host=test-db;Port=5432;Database=azaion;Username=azaion_admin;Password=test_password"
       JwtConfig__Secret: "TestSecretKeyThatIsAtLeast32CharactersLong123!"
       ResourcesConfig__ResourcesFolder: "Content"
-      ResourcesConfig__SuiteInstallerFolder: "suite"
-      ResourcesConfig__SuiteStageInstallerFolder: "suite-stage"
     ports:
       - "8080:8080"
     volumes: