GitLab

Add a PWA manifest for MastoFE at the URL /web/manifest.json

Basically it's kind of the same manifest as Glitch-Soc, but with some changes:

• As PleromaFE/MastoFE doesn't seem to have share URLs (well, didn't really search everywhere but well), the manifest doesn't have the share_target property
• It adds the social category (in the categories field)

TODO

• Add manifest
• Add doc
• Add tests? I'm bad as this so any help or tips would be appreciated ^^