Add installation guide in readme

README.md

@@ -2,13 +2,23 @@
 
 A sweet programming language, mainly inspired by Kotlin, Rust and Dart.
 
+## How to use Candy
 
-Directory structure:
-
-```
-candy
-├── language: specification of this language
-└── packages
-    ├── compiler_dart (soon): Transpiles 🍭 Candy to Dart
-    └── parser: Parses 🍭 Candy source code
-```
+1. Download the [latest release bundle](https://github.com/JonasWanke/candy/releases/latest).
+2. Extract the files:
+   * `candy2dart.exe`: the compiler
+   * `lsp-server.exe`: the Language Server
+   * `vscode-extension.vsix`: the VS Code extension
+   * `candy`: the folder containing the standard library
+3. [Install](https://code.visualstudio.com/docs/editor/extension-gallery#_install-from-a-vsix) the VS Code extension.
+4. In the settings (<kbd>ctrl</kbd> + <kbd>,</kbd>), adjust the paths in the Candy section:
+   * The Candy Path should point to the standard library.
+   * The Language Server Command should point to the `lsp-server.exe`.
+5. Open a project.
+6. Create the following:
+   * a `candyspec.yml` file with a `name: something` field
+   * a `src` folder
+   * a `main.candy` inside the `src` folder with a `main` function
+7. Execute code actions (by default, that's <kbd>ctrl</kbd> + <kbd>.</kbd>).
+8. Select "Build".
+9. If you actually want to run Candy code, also [install Dart](https://dart.dev/get-dart).