[Bugfix] Communications (#7)

This PR contains the work done to implement some bugfixes to the existing source code related to the `Communications` library of this package.

To provide further details about the work done:
- [x] removed an unnecessary function from the `Client` public protocol;
- [x] moved the `MakeURLRequestError` public error to its own file;
- [x] added the `parameters` property to the `Endpoint` public protocol;
- [x] added support for the parameters handling in the `MakeURLRequestUseCase` use case.

Co-authored-by: Javier Cicchelli <javier@rock-n-code.com>
Reviewed-on: #7

Sources/Communications/Use Cases/MakeURLRequestUseCase.swift

@@ -35,6 +35,12 @@ public struct MakeURLRequestUseCase {
             urlComponents.port = port
         }
         
+        if !endpoint.parameters.isEmpty {
+            urlComponents.queryItems = endpoint.parameters
+                .map(URLQueryItem.init)
+                .sorted(by: { $0.name < $1.name })
+        }
+
         guard let url = urlComponents.url else {
             throw MakeURLRequestError.urlNotCreated
         }
@@ -49,10 +55,3 @@ public struct MakeURLRequestUseCase {
     }
 
 }
-
-// MARK: - Errors
-
-enum MakeURLRequestError: Error {
-    case urlNotCreated
-}
-