Maintainance data type specific metadata templates

[JolandaS]

Device general strategy for how to maintain a data type specific metadata templates, using the experiences gathered for #75 for transcriptomics data.

[nsjuty]

Jolanda to check assignee

[JolandaS]

As we are closing up on this use case, I would suggest to add this as a placeholder in the cookbook. It fits in with the idea to have more general recipes on handling metadata (templates) e.g. how to set up a template for other data types (than transcriptomics).
See this issue in the cookbook repo.