feat: Implement file upload functionality with MinIO integration

- Added new dependencies for HMAC, hex, and urlencoding in Cargo.toml.
- Introduced FileUploadSchema for handling multipart file uploads.
- Enhanced UsersService with upload_file method to handle file uploads to MinIO.
- Implemented MinioService for managing MinIO interactions, including file uploads and presigned URL generation.
- Updated environment configuration to include MinIO region and secure settings.
- Added validation for file types and sizes during upload.
- Improved error handling and logging for file upload processes.
- Created utility functions for base64 decoding and content type extraction.

imphnen-libs/Cargo.toml

@@ -19,5 +19,8 @@ dotenvy.workspace = true
 anyhow.workspace = true
 uuid.workspace = true
 base64.workspace = true
-minio.workspace = true
-http.workspace = true
+reqwest = { version = "0.11", features = ["json"] }
+sha2 = "0.10"
+hmac = "0.12"
+hex = "0.4"
+urlencoding = "2.1"