feat(i18n): add arb, json and yaml parsers

packages/wyatt_i18n/example/assets/i18n.en.json

@@ -0,0 +1,13 @@
+{
+    "@@locale": "en",
+    "youHavePushed": "You have pushed {count} times the bouton !",
+    "@youHavePushed": {
+        "placeholders": {
+            "count": {
+                "type": "int"
+            }
+        }
+    },
+    "btnAddFile": "Add file",
+    "btnAddFileCaption": "Max size: 20MB"
+}

packages/wyatt_i18n/example/assets/i18n.en.yaml

@@ -0,0 +1,8 @@
+"@@locale": en
+youHavePushed: You have pushed {count} times the bouton !
+"@youHavePushed":
+    placeholders:
+        count:
+            type: int
+btnAddFile: Add file
+btnAddFileCaption: "Max size: 20MB"

packages/wyatt_i18n/example/lib/main.dart

@@ -45,8 +45,12 @@ class App extends StatelessWidget {
 
                 const I18nRepository repository =
                     I18RepositoryImpl(dataSource: dataSource);
+                
+                final test = (await repository.load('en')).ok;
 
-                print((await repository.load('fr')).err);
+                print(test?.locale);
+                print(test?.data);
+                print(test?.data['btnAddFile']);
 
                 return 'test';
               }),