config(prs): adds pull request templates fo contributors

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,10 @@
+<!--- Make sure to add a descriptive title in the field above! E.g. "Fixes the header title color on the homepage"  -->
+
+## What it does
+<!--- Tell us what this fix does in a few sentences. E.g. "This updates the header title's font color to Ember Orange." -->
+
+## Related Issue(s)
+<!--- Please provide the issue(s) to which this pull request relates to or which issue it closes. E.g. "Closes #1234" -->
+
+## Sources
+<!-- Optional. If applicable be sure to add any screenshots or screen recordings of your work for your reviewers here -->