docs: create a pr standard template (#293)

.github/PULL_REQUEST_TEMPLATE/standard.md

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+# PR Standards
+
+## Opening a pull request should be able to meet the following requirements:
+
+---
+
+For Author:
+
+- [ ]  Targeted PR against correct branch
+- [ ]  included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
+- [ ]  Linked to Github issue with discussion and accepted design
+- [ ]  Targets only one github issue
+- [ ]  Wrote unit and integration tests
+- [ ]  All CI checks have passed
+- [ ]  Added relevant `godoc` [comments](https://blog.golang.org/godoc-documenting-go-code)
+
+---
+
+For Reviewer:
+
+- [ ]  confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
+- [ ]  Reviewers assigned
+- [ ]  confirmed all author checklist items have been addressed
+
+--- 
+
+After reviewer approval:
+
+- [ ]  In case targets main branch, PR should be squashed and merged.
+- [ ]  In case PR targets a release branch, PR should be rebased.