C8 Template groups

[pinussilvestrus]

Builds on top of #555.
Related to camunda/camunda-modeler#2673

[MaxTru]

This is a personal request ;-) Would it be possible to have an example for custom groups in the start script for cloud-templates? It makes fuzzy testing (for this PR, but also for future changes to come) so much easier

[MaxTru]

Also one thought:
Do we have an issue where we document the documentation updates that are necessary once we make this avaialble publically? Rationel I ask: I believe our existing docs are superb. I know we cannot update them now, since this feature is not yet supported / available public, but I would like to ensure that we document it in the used quality once we get to that point.

[pinussilvestrus]

This is a personal request ;-) Would it be possible to have an example for custom groups in the start script for cloud-templates? It makes fuzzy testing (for this PR, but also for future changes to come) so much easier

Good catch, I added it accordingly. I already had an example in fixtures I used for testing, but didn't link it to the start script 👍

Also one thought:
Do we have an issue where we document the documentation updates that are necessary once we make this avaialble publically? Rationel I ask: I believe our existing docs are superb. I know we cannot update them now, since this feature is not yet supported / available public, but I would like to ensure that we document it in the used quality once we get to that point.

👍 I created an issue and linked it in the epic: camunda/camunda-modeler#2723

[MaxTru]

Great feature