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

Tests/Library/Services/FileServiceTests.swift

@@ -26,9 +26,34 @@ struct FileServiceTests {
         #expect(url == .someExistingFolder)
         #expect(url.isFileURL == true)
     }
+    @Test(arguments: [URL.someNewFolder, .someNewFile])
+    func delete(with url: URL) async throws {
+        // GIVEN
+        if try await !service.exists(at: url) {
+            try await service.createFolder(at: url)
+        }
+
+        // WHEN
+        try await service.delete(at: url)
+
+        // THEN
+        let result = try await service.exists(at: url)
+        
+        #expect(result == false)
+    }
+    
+    @Test(arguments: zip([URL.someNonExistingFolder, .someNonExistingFile, .someRandomURL],
+                         [FileServiceError.urlNotExists, .urlNotExists, .urlNotFileURL]))
+    func deleteThrows(
+        with url: URL,
+        expects error: FileServiceError
+    ) async throws {
         // GIVEN
         // WHEN
         // THEN
+        await #expect(throws: error) {
+            try await service.delete(at: url)
+        }
     }
     
     @Test(arguments: zip([URL.someExistingFolder, .someExistingFile, .someNonExistingFolder, .someNonExistingFile],
@@ -62,7 +87,9 @@ struct FileServiceTests {
 
 private extension URL {
     static let someExistingFolder = URL(at: "/private/tmp")
-    static let someExistingFile = URL(at: "/etc/null")
+    static let someExistingFile = URL(at: "/etc/ssh/ssh_config")
+    static let someNewFolder = URL(at: "/private/tmp/folder")
+    static let someNewFile = URL(at: "/private/tmp/file.ext")
     static let someNonExistingFolder = URL(at: "/some/random/folder")
     static let someNonExistingFile = URL(at: "/some/random/file.ext")
     static let someRandomURL = URL(string: "https://some.random.url")!