Create PULL_REQUEST_TEMPLATE.md

Author: askuric

.github/PULL_REQUEST_TEMPLATE.md

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+# Description
+
+Please include a summary of the changes and the related issue. Please also include relevant motivation and context. List any architectures/sensors/motors that the PR is targeting if appicable.
+
+The best approach would be to create an issue and reference it in this pull request.
+Example: 
+
+Fixes # (issue)
+
+## Type of change
+
+Please delete options that are not relevant.
+
+- [ ] Bug fix (non-breaking change which fixes an issue)
+- [ ] New feature (non-breaking change which adds functionality)
+- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
+- [ ] This change requires a documentation update
+
+# How Has This Been Tested?
+
+Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration
+
+**Test Configuration/Setup**:
+* Hardware:
+* IDE: Arduino/Platformio
+* MCU package version (stm32duino/arduino-esp32/..)
+
+# **IMPORTANT** when opening the pull request
+
+* Your pull request MUST target the `dev` branch on this repository. By default you'll probably target `master`, make sure to change it.