Add support to macro

[omarherri]

Support macro feature, so that we can use some of the code in multiple places.

This is an exemple of use case: Macro file:

SEO::macro('detail', function ($product) {
    SEO::jsonLd()->addValue('@graph', [
     '@type' => 'Product',
                '@id' => request()->url() . '#product',
                'name' => ucfirst($product->meta->name),
                'url' => request()->url(),
                'description' => ucfirst($product->meta->name)
                //....
    ]);
});

And in controller we can use this: SEO::detail($product);

Q	A
Is bugfix?	❌
New feature?	✔️
Breaks BC?	❌
Tests pass?	✔️
Fixed issues	comma-separated list of tickets # fixed by the PR, if any

[vinicius73]

Can you provide some tests @omarname ?

[omarherri]

@vinicius73 this doesn't need any testing cause i just added Macroable trait and there is no conflit with methods name.

[omarherri]

This would be useful in way that we don't have to duplicate the same code every where. This only add compatibility with Laravel macro.

[vinicius73]

That sounds good @omarherri but we need at least a README.md update to keep this documented.