Scripted import/export of data visualizations

[lukas-rotsching]

User story

1. As a user
2. I want a script that can export all the visualizations i built in the OS dashboard into a file
3. So that i can later use the same/another script to import the visualizations back into a new OS dashboard container instance

Acceptance criteria

• Use the OS dashboard's REST API to import/export visualizations
• There could be an import/export button on our site that allows access to this feature. In the end however, i do not care how this feature is accessible. I just need to be able to somehow import/export visualizations, so that i don't have to recreate all my visualizations every time i create a new MdH-OS container.
• It's probably a good idea to split this into a front- and a backend part, so the backend part can also be used at container initialization so we can distribute some visualizations together with the source code.

Definition of done (DoD)

A feature is considered complete when

• All of its acceptance criteria have been met.
• It has been thoroughly tested.
• The code has been peer reviewed by the dedicated team.
• It can be seamlessly integrated into the main branch without causing any negative side effects.
• Its core functionality has been thoroughly documented.

DoD general criteria

• Feature has been fully implemented
• Feature has been merged into the mainline
• All acceptance criteria were met
• Product owner approved features
• All tests are passing
• Developers agreed to release