fix: .gitignore + add 44 language JSON files

languages/nl.json

@@ -0,0 +1,25 @@
+{
+  "app_title": "Lity3D Editor",
+  "file": "Bestand",
+  "build": "Bouwen",
+  "scene": "Scène",
+  "help": "Help",
+  "lang": "Taal",
+  "new": "Nieuw",
+  "open": "Open",
+  "save": "Opslaan",
+  "exit": "Afsluiten",
+  "run": "Spel uitvoeren",
+  "compile": "Engine bouwen",
+  "package": "Pakket EXE",
+  "explorer": "Verkenner",
+  "output": "Uitvoer",
+  "ready": "Gereed",
+  "running": "Actief...",
+  "saved": "Opgeslagen",
+  "opened": "Geopend",
+  "build_first": "Eerst bouwen",
+  "kill": "Gestopt",
+  "packaged": "Ingepakt",
+  "about": "Over Lity3D"
+}