Add deprecation notice to README and title

Author: Veykril

README.md

@@ -1,8 +1,10 @@
-# Rust support for Visual Studio Code
+# Rust support for Visual Studio Code (deprecated)
 
 [![](https://vsmarketplacebadge.apphb.com/version/rust-lang.rust.svg)](https://marketplace.visualstudio.com/items?itemName=rust-lang.rust)
 [![VSCode + Node.js CI](https://img.shields.io/github/workflow/status/rust-lang/rls-vscode/VSCode%20+%20Node.js%20CI.svg?logo=github)](https://github.com/rust-lang/rls-vscode/actions?query=workflow%3A%22VSCode+%2B+Node.js+CI%22)
 
+> Note: This extension has been deprecated in favor of the [rust-analyzer project](https://marketplace.visualstudio.com/items?itemName=rust-lang.rust-analyzer).
+
 Adds language support for Rust to Visual Studio Code. Supports:
 
 * code completion

package.json

@@ -1,6 +1,6 @@
 {
     "name": "rust",
-    "displayName": "Rust",
+    "displayName": "Rust (deprecated)",
     "description": "Rust for Visual Studio Code (powered by Rust Language Server/Rust Analyzer). Provides lints, code completion and navigation, formatting and more.",
     "version": "0.7.8",
     "publisher": "rust-lang",