docs: add README

Author: haithium

README.md

@@ -0,0 +1,43 @@
+# BlueLua Docs
+
+Central documentation site for [BlueLua](https://github.com/BlueLua)'s Lua
+modules, built using [VitePress](https://vitepress.dev/).
+
+## Installation
+
+Run the commands from [docs/](docs/):
+
+```sh
+npm install
+```
+
+## Build and Test Locally
+
+1. Run this command to build the docs:
+
+   ```sh
+   npm run build
+   ```
+
+2. Once built, preview it locally by running:
+
+   ```sh
+   npm run preview
+   ```
+
+The `preview` command boots a local static server that serves the built site
+from [docs/.vitepress/dist](docs/.vitepress/dist) at
+[http://localhost:4173](http://localhost:4173).
+
+> [!NOTE]
+>
+> To use a different port, run `npm run preview -- --port 8080`.
+
+## Local Development
+
+```sh
+npm run dev
+```
+
+This starts the VitePress dev server at
+[http://localhost:5173](http://localhost:5173).