chore(github): add GitHub PR and issue templates

.github/ISSUE_TEMPLATE.md

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+Node Version: `X.Y.Z`
+
+Node BACstack Version: `X.Y.Z`
+
+- [ ] Bug Report
+- [ ] Feature Request
+- [ ] Question
+
+### Feature Request / Question
+
+-
+
+### Current Behaviour (Bug Report)
+
+-
+
+### Expected Behaviour  (Bug Report)
+
+-
+
+### Steps to reproduce Issue  (Bug Report)
+
+-

.github/PULL_REQUEST_TEMPLATE.md

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+### Checklist
+
+- [ ] I've read and followed the [Contribution Guide](https://github.com/fh1ch/node-bacstack/blob/master/CONTRIBUTING.md).
+- [ ] My commit messages reference affected issues and mention breaking changes if applicable.
+- [ ] I've updated / wrote inline documentation for the source code affected by my changes.
+- [ ] All mandatory CI checks have passed (see when Pull Request has been submitted).
+
+### Open Question
+
+-
+
+### What does this Pull Request do
+
+-