Added lua exporting

Editor/LuaFileAssetEditor.cs

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+using Splashedit.RuntimeCode;
+using UnityEditor;
+using UnityEngine;
+
+[CustomEditor(typeof(LuaFile))]
+public class LuaScriptAssetEditor : Editor
+{
+    public override void OnInspectorGUI()
+    {
+        LuaFile luaScriptAsset = (LuaFile)target;
+        
+        // Allow user to drag-and-drop the Lua file
+        luaScriptAsset.luaScript = (TextAsset)EditorGUILayout.ObjectField("Lua Script", luaScriptAsset.luaScript, typeof(TextAsset), false);
+    }
+}

Editor/LuaFileAssetEditor.cs.meta

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+fileFormatVersion: 2
+guid: 32c0501d523345500be12e6e4214ec9d

Editor/LuaImporter.cs

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+using UnityEngine;
+using System.IO;
+using UnityEditor.AssetImporters;
+
+namespace SplashEdit.EditorCode
+{
+    [ScriptedImporter(1, "lua")]
+    class LuaImporter : ScriptedImporter
+    {
+        public override void OnImportAsset(AssetImportContext ctx)
+        {
+            var asset = new TextAsset(File.ReadAllText(ctx.assetPath));
+            ctx.AddObjectToAsset("Text", asset);
+            ctx.SetMainObject(asset);
+        }
+    }
+}

Editor/LuaImporter.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: d364a1392e3bccd77aca824ac471f89c