Implemented the "delete(at: )" function for the FileService service in the module target.

Sources/Library/Services/FileService.swift

@@ -20,6 +20,20 @@ public struct FileService: FileServicing {
         }
     }
     
+    // MARK: Functions
+
+    public func delete(at url: URL) async throws (FileServiceError) {
+        guard try await exists(at: url) else {
+            throw FileServiceError.urlNotExists
+        }
+        
+        do {
+            try fileManager.removeItem(at: url)
+        } catch {
+            throw FileServiceError.urlNotDeleted
+        }
+    }
+    
     public func exists(at url: URL) async throws (FileServiceError) -> Bool {
         guard url.isFileURL else {
             throw FileServiceError.urlNotFileURL