chore: installation steps

Author: mhanberg

README.md

@@ -7,3 +7,15 @@ elixir-tools.vscode provides support for:
 * Filetype detection for .ex and .exs Elixir files
 * Syntax highlight for Elixir
 * Credo Language Server
+
+## Install
+
+Currently you must install from source.
+
+```bash
+# package up the extension into a .vsix file
+$ npx vsce package
+
+# install the .vsix package
+$ code --install-extension elixir-tools-0.0.1.vsix --force
+```

package.json

@@ -1,5 +1,5 @@
 {
-  "name": "elixir-tools.vscode",
+  "name": "elixir-tools",
   "displayName": "elixir-tools.vscode",
   "description": "Elixir extension for VSCode.",
   "version": "0.0.1",