Refactor in one unique command with subcommand + add a new command to generate ressources from a configuration file

Sources/ResgenSwift/Strings/Twine/TwineError.swift

@@ -0,0 +1,27 @@
+//
+//  TwineError.swift
+//  
+//
+//  Created by Thibaut Schmitt on 10/01/2022.
+//
+
+import Foundation
+
+enum TwineError: Error {
+    case fileNotExists(String)
+    case langsListEmpty
+    case defaultLangsNotInLangs
+    
+    var localizedDescription: String {
+        switch self {
+        case .fileNotExists(let filename):
+            return " error:[\(Twine.toolName)] File \(filename) does not exists "
+            
+        case .langsListEmpty:
+            return " error:[\(Twine.toolName)] Langs list is empty"
+            
+        case .defaultLangsNotInLangs:
+            return " error:[\(Twine.toolName)] Langs list does not contains the default lang"
+        }
+    }
+}