A03: Create metatag for taxa-list (”source/origin” + ”date”) on survey-level

[erikbrowaldh]

When creating a survey, possible to add source and date of species-list (taxa) as meta-data in the yaml-file.
For example:
source “SGU” or “artdatabanken” or “smhi” , this field can be a string so user can write in multiple names of origin.
Date: “yyyy-mm-dd”, i.e. the date when that species list was last updated, currently: 2022-12-16

This feature is optional for the user to fill in.