docs: add rtl addon docs

Author: streamich

README.md

@@ -50,6 +50,7 @@ __Motto of `nano-css` is simple__: *create the smallest possible CSS-in-JS libra
   - [`spread`](./docs/spread.md)
   - [`array`](./docs/array.md)
   - [`snake`](./docs/snake.md)
+  - [`rtl`](./docs/rtl.md)
 - [Server-side rendering](./docs/SSR.md)
 
 

docs/Addons.md

@@ -36,6 +36,7 @@ plenty more to chose from. Below is a list of addons shipped with `nano-css`.
 - [`spread`](./spread.md) — returns an object with data attributes used as a selector
 - [`array`](./array.md) — use arrays to specify multiple values
 - [`snake`](./snake.md) — chain styling rules
+- [`rtl`](./rtl.md) — flips all styles RTL (right-to-left)
 
 ## Addon Installation
 

docs/rtl.md

@@ -0,0 +1,28 @@
+# `rtl` Addon
+
+Flips all your styles to support right-to-left styling.
+
+Example:
+
+```js
+nano.put('.foo', {
+    textAlign: 'left',
+    marginLeft: '100px'
+});
+```
+
+Result:
+
+```css
+.foo {
+    text-align: right;
+    margin-right: 100px;
+}
+```
+
+
+## Installation
+
+Simply install `rtl` addon.
+
+Read more about the [Addon Installation](./Addons.md#addon-installation).