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>

Azaion.Common/Configs/ResourcesConfig.cs

@@ -3,6 +3,4 @@ namespace Azaion.Common.Configs;
 public class ResourcesConfig
 {
     public string ResourcesFolder { get; set; } = null!;
-    public string SuiteInstallerFolder { get; set; } = null!;
-    public string SuiteStageInstallerFolder { get; set; } = null!;
-}
+}