[10.x] Add search engine meta data to results

[tobz-nz]

When adding extra options to search queries, xtra data may be return in the raw result - this PR adds the relevant details to the resulting Models via the withScoutMetadata() method.

Example:

$products = Product::search(
    $request->term,
    fn ($e, $q, $o) => $e->search($q, array_merge($o, [
        'attributesToHighlight' => ['title'],
        'showRankingScore' => true,
    ]))
)->paginate(48);

dd($products->first()->scoutMetadata());

// output
array:2 [
  "_formatted" => array:31 [
    "title" => "<em>HP</em> <em>Elitebook</em> 1040 G10 14 Inch i5-1335U 4.6GHz 16GB RAM 256GB SSD Laptop with Windows 10/11 Pro"
    ...
  ]
  "_rankingScore" => 0.86111111111111
]

[mmachatschek]

@tobz-nz there is a higher chance to get this merged if you could add tests + implement the equivalent code for the algolia search driver

[tobz-nz]

@mmachatschek I've added the same functionality to AgloliaEngine and added some assertions into the test_map_correctly_maps_results_to_models tests for both engines (I hope this is ok and a separate test is not required - it makes so me putting it there)

I've also added the same functionality to the lazyMap methods as well.