Extract `getContributers` to Support class

[Josh Bonnick]

Currently we cannot mock nor retrieve the contributors json outside the AboutController.

getContributers should be extracted to another class, perhaps FetchContributers in the Support directory.

Initial Suggestion

<?php

namespace App\Support;

use App\Models\Contributor;
use Illuminate\Support\Facades\File;

class FetchContributors
{
    /**
     * @return array<int, Contributor>
     */
    public function getContributors(): array
    {
        return collect($this->getJson())
            ->map(fn (array $contributor) => new Contributor(...$contributor))
            ->all();
    }

    /**
     * @return array<int, array{
     *       id: int,
     *       name: string,
     *       url: string,
     *       contributions: array<int, string>,
     *  }
     */
    public function getJson(): array
    {
        $contributors = File::json(base_path('contributors.json'), JSON_THROW_ON_ERROR);

        return $contributors['contributors'] ?? [];
    }
}

public function __invoke(FetchContributors $contributors): View
{
    $contributors = Cache::remember('contributors', now()->addDay(), $contributors->getContributors(...));

    // ...continues

Originally posted by @joshbonnick in #237 (comment)