Branding and translation

[gnouts]

Would you consider some changes to let admin translate and rebrand filepizza ?

For example, I want to install filepizza on my server for an assocation but my users are french speaker and I would like to change the spinning pizza by something that match my assocation colors and theme.

Currently, to translate we have to crawl all files in src/ and can't blindly replace FilePizza because it's also a function name. Maybe having a separate file with only translatable strings ?
Also, images are arrow.ai and pizza.psd which are not very common format or easily editable. Maybe having PNG format if technically possible ?

[kern]

Happy to accept PRs for this!