Create decision-record.md

Adding a new issue template for architecture decision records - Work in progress, these will shortly be integrated with a dedicated project board

.github/ISSUE_TEMPLATE/decision-record.md

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+---
+name: Architectural Decision Record
+about: Propose an architectural decision
+title: 'ADR: [decision here]'
+labels: 'decision-record'
+assignees: ''
+
+---
+
+# [short title of solved problem and solution]
+
+## Context and Problem Statement
+
+[Describe the context and problem statement, e.g., in free form using two to three sentences. You may want to articulate the problem in form of a question.]
+
+## Decision Drivers <!-- optional -->
+
+- [driver 1, e.g., a force, facing concern, …]
+- [driver 2, e.g., a force, facing concern, …]
+- … <!-- numbers of drivers can vary -->
+
+## Considered Options
+
+- [option 1]
+- [option 2]
+- [option 3]
+- … <!-- numbers of options can vary -->
+
+## Decision Outcome
+
+Chosen option: "[option 1]", because [justification. e.g., only option, which meets k.o. criterion decision driver | which resolves force force | … | comes out best (see below)].
+
+### Positive Consequences <!-- optional -->
+
+- [e.g., improvement of quality attribute satisfaction, follow-up decisions required, …]
+- …
+
+### Negative Consequences <!-- optional -->
+
+- [e.g., compromising quality attribute, follow-up decisions required, …]
+- …
+
+## Pros and Cons of the Options <!-- optional -->
+
+### [option 1]
+
+[example | description | pointer to more information | …] <!-- optional -->
+
+- Good, because [argument a]
+- Good, because [argument b]
+- Bad, because [argument c]
+- … <!-- numbers of pros and cons can vary -->
+
+### [option 2]
+
+[example | description | pointer to more information | …] <!-- optional -->
+
+- Good, because [argument a]
+- Good, because [argument b]
+- Bad, because [argument c]
+- … <!-- numbers of pros and cons can vary -->
+
+### [option 3]
+
+[example | description | pointer to more information | …] <!-- optional -->
+
+- Good, because [argument a]
+- Good, because [argument b]
+- Bad, because [argument c]
+- … <!-- numbers of pros and cons can vary -->
+
+## Links <!-- optional -->
+
+- [Link type](link to adr) <!-- example: Refined by [xxx](yyyymmdd-xxx.md) -->
+- … <!-- numbers of links can vary -->