[ADR] - Create a workflow documentation

[timonmasberg]

We should write down our workflow on how we handle feature requests and bugs at organization level.
As we already discussed, we want to use Github projects because we can use them across all repositories.

My suggestion would be that we create ALL feature requests and bugs in this repository. After we prioritized them, we create an Epic issue for feature requests where we can have technical discussions and list all subtasks. Every issue should be added to a global project where we create different views. For our release cycles, we could use milestones.

[timonmasberg]

We could also use: https://docs.github.com/en/issues/planning-and-tracking-with-projects/automating-your-project/automating-projects-using-actions, so lets try to describe our ideal workflow, and then we can see how much we have to implement ourselves.

[JSPRH]

When planing to implement a feature, we create an issue, called "Epic", collecting everything about the feature. This issue shall be labeled type:epic and contain a description, any related information, as well as acceptance criteria / definition of done.

For implementation, we break down the epic into implementation issues which are linked to the epic. An implementation issue is a vertically integrated, small subscope of the feature defined in the epic.