Add avif as a new content type in Mojo::MIME

[simeoreig]

After struggling with the Google search console, I discovered that the problem is that mojolicious does not send .avif files as images. Question: Since this format is gaining popularity, wouldn't it be interesting to add it to the table of known content types?

I know I can simply add this line at startup, but I had to find out the hard way.

$self->types->type(avif => ‘image/avif’);

Best regards and thanks for Mojolicious!