infra: add pr template, codeowners (#2537)

.github/CODEOWNERS

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+# Notify @EWDurbin for all opened Issues and Pull Requests
+*	@EWDurbin @JacobCoffee

.github/PULL_REQUEST_TEMPLATE.md

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+<!--
+By submitting this pull request, you agree to:
+- follow the [PSF's Code of Conduct](https://www.python.org/psf/conduct/)
+-->
+#### Description
+
+-
+
+<!--
+If applicable, please add in issue numbers this pull request will close, if applicable
+Examples: Fixes #4321 or Closes #1234
+
+Ensure you are using a supported keyword to properly link an issue:
+https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue#linking-a-pull-request-to-an-issue-using-a-keyword
+-->
+#### Closes
+
+- 
+