added PR template to make it easier for newbies

PULL_REQUEST_TEMPLATE.md

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+Your checklist for this pull request
+🚨Please review the guidelines for contributing to this repository.
+
+[] Make sure you are requesting to pull a topic/feature/bugfix branch (right side). Do not pull request to Master please.(when in doubt request Develop branch)
+[] Test to make sure your feature/bugfix doesn't break other features ;)
+[] Write a meaningful description of what your changes are.
+[] Wait patiently and celebrate, you've submitted changes to the extension!
+
+Description
+Please describe your pull request.
+
+<3 Thank you!