Add pull request template (#1105)

Issue: AAH-1219

.github/pull_request_template.md

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+# Description 🛠
+_Add PR description here_
+
+# Reviewer Checklists  👀
+Developer reviewer:
+- [ ] Code looks sound, good architectural decisions, no [code smells](https://www.codegrip.tech/productivity/everything-you-need-to-know-about-code-smells/)
+- [ ] There is a Jira issue associated (note that "No-Issue" should be rarely used)
+- [ ] Tests are included in `galaxy_ng/tests/integration` or `galaxy_ng/tests/functional`, and they fully cover necessary test scenarios… or tests not needed
+
+QE reviewer ([exceptions](https://docs.engineering.redhat.com/display/AUTOHUB/Other+Team+Processes#OtherTeamProcesses-galaxy_ngrepo)):
+- [ ] Tests are included in `galaxy_ng/tests/integration` or `galaxy_ng/tests/functional`, and they fully cover necessary test scenarios… or tests not needed
+- [ ] PR meets applicable Acceptance Criteria for associated Jira issue
+
+Note: when merging, include the Jira issue link in the squashed commit

CHANGES/1219.misc

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+Add pull request template