Create issue_template

.github/issue_template.md

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+## Description
+
+[Briefly describe what should be implemented or achieved, and why it is relevant to the project.]
+
+## Acceptance Criteria
+
+- [Criterion for when the issue can be considered complete]
+- [Criterion]
+- [Criterion]
+
+## Subissues
+
+- Task 1 (#issue-number)
+- Task 2 (#issue-number)
+- Task 3 (#issue-number)
+
+## Dependencies
+
+Optionally dependent on:
+
+- #issue – [Short description]
+
+## Notes
+
+- [Technical details, decisions, links, sketches, or other relevant information]