docs: add docs

Author: mouse484

README.md

@@ -1 +1,21 @@
-# svelte-inline-css
+# svelte-inline-css
+
+Easy to use inline style system like [Vue.js inline style](https://v3.vuejs.org/guide/class-and-style.html#binding-inline-styles) in Svelte(Use [use:action](https://svelte.dev/docs#use_action))
+
+# Installation
+
+```
+yarn add svelte-inline-css
+```
+
+# Usage
+
+```svelte
+<script lang="ts">
+  import style from './style';
+  export let height: `${number}px` = '0px';
+</script>
+
+<div use:style={{ height }} />
+<div use:style={{ color: 'red' }}>red</div>
+```