feat: add support for lazy props in modals

[Tofandel]

Inertia doesn't support lazyness for nested props because it only does a simple array_filter, but it has a magic trick up it's sleeve that unpacks string props with dots in them after the array_filter has been done https://github.com/inertiajs/inertia-laravel/blob/master/src/Response.php#L148

We can use that and share a flat array of modal props to inertia which will enable the lazy prop feature by using only: ['modal.props.someProp']

This PR needs lepikhinb/momentum-modal-plugin#4 to work properly

Fixes: #13

Props can go back to their unflattened form when inertiajs/inertia-laravel#435 is released

[lepikhinb]

Thank you for the PR. I'm going to review and either merge or re-implement this soon.

[jeffreyvanhees]

@lepikhinb Do you have any updates on this? It would be great when this feature is implemented. Essential for the 'modal principle' in my opinion.

_{(No pressure, I know there are too few hours in a day)}

[what-the-diff]

• The props are now passed as a parameter to the constructor.
• The with method is used to set the props instead of passing them directly in the constructor.
• A new array $flatProps is created and it's populated by looping through all keys/values from $this->props, adding 'modal.' before each key name (e.g: modal.$key). This array will be merged into inertia()->share().
• Inertia::share() no longer receives an associative array for "modal" but only its component name ($this->component) and an indexed array containing all flatProps values (...$flatProps).

[jeffreyvanhees]

@lepikhinb Do you have an idea yet whether you will merge this PR? :)

[lepikhinb]

@jeffreyvanhees still not sure about the implementation

[pascalbaljet]

Manually looping over the props can be avoided by using the Arr::dot helper method:

inertia()->share(['modal' => $this->component(), ...Arr::dot($this->props, 'modal.props.')]);