Update README.md

Author: RimuruDev

README.md

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-FBX Size Viewer for Unity
+# FBX Size Viewer for Unity
+
+A simple Unity Editor tool to quickly check the size of all `.fbx` files in your project.
+
+## Features
+
+- View `.fbx` file sizes directly in Unity Editor.
+- Language switcher: **English / Russian**.
+- Scrollable list for projects with many `.fbx` files.
+- Files sorted by size (largest first).
+- Lightweight and easy to integrate.
+
+## Installation
+
+### Option 1: Download Release  
+1. Download the latest release from [Releases](https://github.com/YOUR_REPO/releases).
+2. Extract the `FBXSizeViewer` folder into `Assets/Editor/`.
+3. Done.
+
+### Option 2: Manual Installation  
+1. Copy the `FBXSizeViewer.cs` script into `Assets/Editor/`.
+2. Done.
+
+## Usage
+
+1. Open Unity Editor.
+2. Go to `Tools → AbyssMoth → FBX Size Viewer`.
+3. A window will display all `.fbx` files in your project along with their sizes.
+4. Click **"Switch Language"** to toggle between English and Russian.
+
+## License
+
+This project is licensed under the **MIT License** – see the [LICENSE](LICENSE) file for details.
+
+**Author: RimuruDev**  
+GitHub: [github.com/RimuruDev](https://github.com/RimuruDev)