add templating engine install command

Author: kpicaza

docs/framework/templating.md

@@ -12,12 +12,20 @@ Use [PHP Pug as Template engine](https://github.com/pug-php/pug)
 
 > [Pug Template renderer](https://github.com/antidot-framework/phug-template-renderer)
 
+```bash
+composer require antidot-fw/phug-template-renderer
+```
+
 ## Twig Template Renderer
 
 Use [Twig as Template engine](https://twig.symfony.com/) 
 
 > [Twig Template renderer](https://github.com/antidot-framework/twig-template-renderer)
 
+```bash
+composer require antidot-fw/twig-template-renderer
+```
+
 ## Usage
 
 Inject `Antidot\Render\TemplateRenderer` interface in your request handler constructor, then render given template with given parameters.