Allow upload to replace file

[mikaelpopowicz]

This PR adds ability to replace file when uploading a file with an existing file name.

It adds a configuration option upload_replace_existing, when set to true it allows upload to replace existing file.

It also adds the new uploadReplaceExisting method on field, tool and wrapper to configure it programmatically

// app/Nova/Project.php

use Oneduo\NovaFileManager\FileManager;
use Illuminate\Contracts\Filesystem\Filesystem;
use Illuminate\Support\Facades\Storage;
use Laravel\Nova\Http\Requests\NovaRequest;

class Project extends Resource
{
    // ...

    public function fields(NovaRequest $request): array
    {
        return [
            // ... any other fields
            FileManager::make(__('Attachments'), 'attachments')
                ->uploadReplaceExisting(function (NovaRequest $request): bool {
                    return true;
                }),
        ];
    }
}

Closes #268

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.46% 🎉

Comparison is base (f1d43b4) 71.87% compared to head (0c11f54) 72.34%.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #283      +/-   ##
============================================
+ Coverage     71.87%   72.34%   +0.46%     
- Complexity      270      274       +4     
============================================
  Files            44       44              
  Lines           889      904      +15     
============================================
+ Hits            639      654      +15     
  Misses          250      250              

Files Changed	Coverage Δ
src/Http/Requests/UploadFileRequest.php	100.00% <100.00%> (ø)
src/Traits/Support/InteractsWithFilesystem.php	72.68% <100.00%> (+1.02%)	⬆️

... and 2 files with indirect coverage changes

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[Rezrazi]

LGTM 🚢