Update README.md

Author: mkh-user

README.md

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-# rust-mode
-Rust support for Text Forge code editor
+# Text Forge Rust mode
+Official Rust mode for Text Forge code editor
+
+---
+
+Rust Mode is a lightweight and functional mode for Text Forge code editor. It's a part of official Text Forge modes.
+
+## Mode Features
+- Updated to [Text Forge Mode API V2.0](https://github.com/text-forge/text-forge/pull/71)
+- Edit Rust files in Text Forge's feature rich editing enviroment
+- Simple code highlighter
+
+## Setup
+Supports Text Forge 0.1-stable and newer versions.
+
+### Method 1: From releases
+- Download `rust.tfmode` file from releases. 
+- Open Text Forge and go to Settings > Mode Manager > Import Mode and select mode file. 
+- Mode is ready to use. If you are updating, please restart the editor for a safer experience.
+
+### Method 2: From repo
+- Download repo as zip and extract it. 
+- Open editor data folder (use Settings > Open Data Folder) 
+- Copy `modes/` folder content to data `modes/`.
+- Restart editor.
+
+### Development
+This project is under Text Forge organization and MIT license, so all contribution and development process is same as Text Forge project, for more information see [online docs](https://text-forge.github.io/docs).