add readme

docs/README.txt

@@ -0,0 +1,35 @@
+The Lucide docs website is built with Vitepress: https://vitepress.dev/
+This is Markdown-based documentation powered by Vue.
+
+This is why this file is in txt format.
+
+## Development
+
+```sh
+# Install dependencies
+pnpm install
+```
+
+```sh
+# Start docs dev server
+pnpm docs:dev
+
+# Start api dev server
+pnpm dev
+```
+
+## Build
+
+```sh
+# Build docs
+pnpm docs:build
+```
+
+```sh
+# Build api
+pnpm build:api
+```
+
+## Components
+
+See .vitepress directory.