fix: .gitignore + add 44 language JSON files

languages/en.json

@@ -0,0 +1,25 @@
+{
+  "app_title": "Lity3D Editor",
+  "file": "File",
+  "build": "Build",
+  "scene": "Scene",
+  "help": "Help",
+  "lang": "Language",
+  "new": "New",
+  "open": "Open",
+  "save": "Save",
+  "exit": "Exit",
+  "run": "Run Game",
+  "compile": "Build Engine",
+  "package": "Package EXE",
+  "explorer": "Explorer",
+  "output": "Output",
+  "ready": "Ready",
+  "running": "Running...",
+  "saved": "Saved",
+  "opened": "Opened",
+  "build_first": "Build engine first",
+  "kill": "Process killed",
+  "packaged": "Packaged",
+  "about": "About Lity3D"
+}