[AssetMapper] Adding possible precompressor values

[ThomasLandauer]

Page: https://symfony.com/doc/current/frontend/asset_mapper.html#pre-compressing-assets

Info is taken from: https://symfony.com/blog/new-in-symfony-7-3-assets-pre-compression

[JoaoGabrielD]

Another useful information is the possibility of setting an array with multiple of those values.
I've tested this, and it worked:

framework:
    asset_mapper:
        # ...
        precompress:
            format: [
                'gzip',
                'brotli',
                'zstandard',
            ]

[javiereguiluz]

Thanks Thomas! @JoaoGabrielD you are right! We added that while merging. Thanks!