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

Sources/Library/Protocols/FileServicing.swift

@@ -8,6 +8,7 @@ public protocol FileServicing {
     
     // MARK: Functions
     
+    func createFolder(at url: URL) async throws (FileServiceError)
     func delete(at url: URL) async throws (FileServiceError)
     func exists(at url: URL) async throws (FileServiceError) -> Bool
     

Sources/Library/Services/FileService.swift

@@ -22,6 +22,21 @@ public struct FileService: FileServicing {
     
     // MARK: Functions
 
+    public func createFolder(at url: URL) async throws (FileServiceError) {
+        guard try await !exists(at: url) else {
+            throw FileServiceError.urlAlreadyExists
+        }
+        
+        do {
+            try fileManager.createDirectory(
+                at: url,
+                withIntermediateDirectories: true
+            )
+        } catch {
+            throw FileServiceError.folderNotCreated
+        }
+    }
+    
     public func delete(at url: URL) async throws (FileServiceError) {
         guard try await exists(at: url) else {
             throw FileServiceError.urlNotExists