feat(i18n): add ClaudeDo.Localization project with nested-JSON locale parser

src/ClaudeDo.Localization/LocaleFile.cs

@@ -0,0 +1,15 @@
+namespace ClaudeDo.Localization;
+
+public sealed class LocaleFile
+{
+    public LocaleFile(string code, string name, IReadOnlyDictionary<string, string> strings)
+    {
+        Code = code;
+        Name = name;
+        Strings = strings;
+    }
+
+    public string Code { get; }
+    public string Name { get; }
+    public IReadOnlyDictionary<string, string> Strings { get; }
+}