This PR moves the whole scopes to a dedicated builder (which already exists).

This approach presented introduced in the "Dedicated query builders for Eloquent models" blogpost.

@grimzy What do you think about this approach? Do you notice any drawbacks?

Personally, in my own company, we're using only dedicated model builders and there's a lot of benefit from it.
I thought it could be great to have real IDE autocomplete for spatial methods:

namespaceApp\Builders;useGrimzy\LaravelMysqlSpatial\Eloquent\BuilderasSpatialBuilder;useGrimzy\LaravelMysqlSpatial\Types\Point;class UserBuilderextends SpatialBuilder{publicfunctioninRange(Point$point,int$radius)    {$this->distanceSphereValue('location',$point)->having('distance','<',$radius);return$this;    }}