Add process builder

[millancore]

As not all process parameters are needed, a builder is added to make it visually simpler and there is no need to use null values.

E.g Add output format "webp'

Now:

$img = $resized->process('http://www.example.com/some-image.jpg', '100', '', '', ['output' => 'webp', 'quality' => 90]);

With Builder:

$img = $resized->src('http://www.example.com/some-image.jpg')
    ->width(100)
    ->quality(90)
    ->output('webp')
    ->url();

[jeffochoa]

I like the idea, the fluent api certainly is an improvement.

There are a couple of structural issues we'd need to address first:

1. The Builder is only acting as a proxy to the Image::class so it feels redundant, I think you can simplify this and keep only one class (maybe just the Builder?).

2. On the Reszed:class maybe just rename the builder()' method to src()` so it reads like:

$resized->src('image.jpg')->width(100)->url();

3. On the ProcessBuilder::class you have a process() method:

return ProcessBuilder::new($this)->process($url);

But this method isn't actually processing anything, is only creating a new instance of the Image::class. I think solving #1 will resolve this issue as well.

[millancore]

I like the idea, it simpler, I will make the changes. thanks @jeffochoa

[millancore]

Updated