Add max depth to dot functions.

[skeemer]

This would make it so we could restrict the recursive depth that gets dotted to avoid over-eager names.

Example

$array = [
    'level1' => [
        'level2' => [
            'attribute1' => 'foo',
            'attribute2' => 'bar',
        ]
    ]
];
Arr::dot($array, maxDepth: 2);

Results

[
    'level1.level2' => [
        'attribute1' => 'foo',
        'attribute2' => 'bar',
    ]
]

I'm willing to make a PR to update Arr::dot() and Collection::dot() if this is of interest. I've needed this in multiple projects and finally made a dotDepth() macro but I think it would be nice to have in core.