Add support for making an exact copyof an app in Altinn Studio

[acn-sbuad]

Description

For annual revisions of an application it would be useful to start development of a new version of an applicaiton based on an existing version.

Design Considerations

Where: My first instinct is to put this functionality in our dashboard. We have done a larger concept work of how we can show this page in the future. To me it is logical to put the copy functionality in a context menu on the dashboard.

🚧 Concept draft for illustration purpose 🚧

It would be a reach to ask for this to be realized in this issue, but we could implement the context menu. If it could be expanded and be carried over to the new design when implemented.

Proposed solution on how to implement a context menu on our card designs

Challenge
Our dashboard has a limitation on how many apps that can be viewed and searched on. If this limitation hits one of our user they will not be able to copy the app. (#4501)

If we do not think this bug will affect our users I propose this solution, if we think this will be an issue we should look into an alternative solution.

Prototype with with name popover
The sketches are based on the design work on #3328. Therefore some aspects of the sketches will look different than how our dashboard looks now.

Considerations

• Gitea doesn't seem to have an endpoint for mirroring a gitea repository, could we use the git commands directly or will we have to copy the contents from the master repository on disk?
• Are we able to copy all the permissions of the existing repository ?
• How will the users permissions affect creating a new repository for the org? E.g. is user allowed to create new repositories?
• Test if we can use a clone>edit remote>push approach to copying the app
• Is this functionality limited to the apps or would it be useful for other types of repositories too?

Acceptance criteria

• It is possible to copy an existing app in Altinn Studio
• Application does not need to function (e.g. mismatch in configuration is okay)

Specification tasks

• How should the user experience be in Altinn Studio

Development tasks

• Implement logic in designer backend to copy the contents of a repository into another repo
• Identify which manual changes must be done for the app to be operational
  • Policy file
• Write user documentation on how app developers can copy apps & make required changes
  • Altinn docs.
  • Picture guide
• QA
• Manual test is complete (if relevant)

Test

Add test cases here as checkboxes that are being tested as part of the changes.

[altinnadmin]

@acn-sbuad The ideal solution for this would be to add support for forking inside the same org in Gitea since that will also keep the history intact and simplify "bugfix-flow" across yearly revisions.

There are several existing issues for that, but no real functional use case that has been able to convince the maintainers so far.

Perhaps we have a chance, especially if we provide a pull request?