Add a discussion issue template
### Pros
<!--
- Friendlier user interface
-->
### Cons
<!--
- Nyan cat will get angry
-->
### Code Change
// some super duper simple code change
// ...
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
### Pros
<!--
- Friendlier user interface
-->
### Cons
<!--
- Nyan cat will get angry
-->
### Code Change
// some super duper simple code change
// ...