fix: .gitignore + add 44 language JSON files

EditorCS/Program.cs

@@ -0,0 +1,11 @@
+namespace Lity3DEditor;
+
+static class Program
+{
+    [STAThread]
+    static void Main()
+    {
+        ApplicationConfiguration.Initialize();
+        Application.Run(new MainForm());
+    }
+}