Generation des strings sans twine et generation des tags. Refactor de toutes les commandes strings (Twine, CustomStrings, Tags) dans une commande avec des sous commandes

Sources/Strings/Twine/TwineError.swift

@@ -0,0 +1,31 @@
+//
+//  TwineError.swift
+//  
+//
+//  Created by Thibaut Schmitt on 10/01/2022.
+//
+
+import Foundation
+
+extension Strings {
+    
+    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"
+            }
+        }
+    }
+    
+}