Dashboard Scenes: Settings - One can define and edit Template variables

[dprokop]

Basic infrastructure

Beta Give feedback

1. One view dashboard variables list
2. One can CRUD a variable
3. One can create a new variable
4. Variable(s) changes are reflected in a Dashboard Scene
5. One can delete a variable from Variable Editing Form #82140
   area/dashboard/templating area/scenes internal type/chore +4
   
6. Variable changes are validated in Variable Editing Form #82256
   area/scenes internal team/grafana-dashboards type/chore +4
   

Variables support

Beta Give feedback

1. One can use Constant variable
2. One can use Custom variable #80679
   area/dashboard/templating area/scenes internal type/chore +4
   
3. One can use TextBox variable
4. One can use Query variable
5. One can use Datasource variable
6. One can use Interval variable
7. One can use AdHoc Variable
8. One can preview values in the editor that offer this feature

Decisions

Beta Give feedback

1. Apply -- should we keep this pattern ? We will not use apply, no discard changes. Only a "back to list"

[grafanabot]

@dprokop please add one or more appropriate labels. Here are some tips:

• if you are making an issue, TODO, or reminder for yourself or your team, please add one label that best describes the product or feature area. Please also add the issue to your project board. 🚀

• if you are making an issue for any other reason (docs typo, you found a bug, etc), please add at least one label that best describes the product or feature that you are discussing (e.g. area/alerting, datasource/loki, type/docs, type/bug, etc). Our issue triage doc also provides additional guidance on labeling. 🚀

Thank you! ❤️