Support for for MorphTo/MorphToMany/MorphedByMany

[flxsource]

Similar to the BelongsTo field, it would be useful to create a new resource directly from the relationship panel.

[cnraju]

@flxsource Can you please help me how to use BelongsTo in that package...
i am using
```
Row::make('lineitems', [
Number::make('Quantity')
->fieldClasses('w-full px-8 py-6')
->hideLabelInForms()->rules('required'),
BelongsTo::make('Product')->fieldClasses('w-full px-8 py-6')
->hideLabelInForms(),
Number::make('Price')
->fieldClasses('w-full px-8 py-6')
->hideLabelInForms(),
])->fieldClasses('w-full px-8 py-6')
->labelClasses('w-1/5 px-8 py-6')->hideLabelInForms()->addRowText('Add Product'),

giving me error Undefine Index :fields

[thinckx]

I could also use this feature - on a belongsToMany relation, to be specific. Is someone working on this? Can I contribute?

[beliolfa]

We are lately busy with client work. We will be happy for sure to take a look in your PR if you could work on it.

Thanks @thinckx !