Add app.vup.Vup

[lukehmcc]

Please confirm your submission meets all the criteria

• I have read the [App Requirements][reqs] and [App Maintenance][maint] pages.
• My pull request follows the instructions at [App Submission][submission].
• I am using only the minimal set of permissions. (If not, please explain each non-standard permission.)
• This is a cloud storage app so access to the home fs is required.
• I utilize the discord fs because one feature is a built in jellyfin server so giving access to discord allows others to see what you are streaming.
• All assets referenced in the manifest are redistributable by any party. If not, the unredistributable parts are using an extra-data source type.
• I am an upstream contributor to the project. If not, I contacted upstream developers about submitting their software to Flathub. Link: https://github.com/redsolver/vup
• I own the domain used in the application ID or the domain has a policy for delegating subdomains (e.g. GitHub, SourceForge).
• Any additional patches or files have been submitted to the upstream projects concerned. (If not, explain why.)