Add support to macro (#301)

* Add support to macro

* Update README.md

README.md

@@ -520,6 +520,27 @@ class CommomController extends Controller
 </html>
 ```
 
+#### Using Macro
+Using the same code in multiple places can be tedious, which is why this package includes a Macroable trait. This trait allows additional functionality to be added to a class that was not defined in the class definition, using a simple trait.
+
+For example, imagine that you need to add meta titles and descriptions for your pages. You can add your Macroable functions in the AppServiceProvider or create a dedicated file for this purpose, and define your function as shown in the code snippet:
+```php
+    SEOTools::macro('webPage', function (string $title, string $description) {
+        SEOMeta::setTitle($title);
+        SEOMeta::setDescription($description);
+        SEOMeta::setCanonical('http://current.url.com');
+        OpenGraph::setDescription($description);
+        OpenGraph::setTitle($title);
+        OpenGraph::setUrl('http://current.url.com');
+        OpenGraph::addProperty('type', 'webpage');
+    });
+```
+
+In your controller, you can use the following code to utilize the function:
+```php
+    SEOTools::webPage('Page title', 'Page description');
+```
+
 #### API (SEOMeta)
 
 ```php

src/SEOTools/SEOTools.php

@@ -3,6 +3,7 @@
 namespace Artesaos\SEOTools;
 
 use Artesaos\SEOTools\Contracts\SEOTools as SEOContract;
+use Illuminate\Support\Traits\Macroable;
 
 /**
  * SEOTools provides implementation for `SEOTools` contract.
@@ -11,6 +12,8 @@
  */
 class SEOTools implements SEOContract
 {
+    use Macroable;
+
     /**
      * {@inheritdoc}
      */