docs: add pr template

Author: marionebl

PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,39 @@
+<!--- Provide a general summary of your changes in the Title above -->
+
+## Description
+<!--- Describe your changes in detail -->
+
+## Motivation and Context
+<!--- Why is this change required? What problem does it solve? -->
+<!--- If it fixes an open issue, please link to the issue here. -->
+
+## Usage examples
+<!--- Provide examples of intended usage -->
+
+```js
+// commitlint.config.js
+module.exports = {
+
+};
+```
+
+```sh
+echo "your commit message here" | commitlint # fails/passes
+```
+
+## How Has This Been Tested?
+<!--- Please describe in detail how you tested your changes. -->
+
+## Types of changes
+<!--- What types of changes does your code introduce? Put an `x` in all the boxes that apply: -->
+- [ ] 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 change)
+
+## Checklist:
+<!--- Go over all the following points, and put an `x` in all the boxes that apply. -->
+<!--- If you're unsure about any of these, don't hesitate to ask. We're here to help! -->
+- [ ] My change requires a change to the documentation.
+- [ ] I have updated the documentation accordingly.
+- [ ] I have added tests to cover my changes.
+- [ ] All new and existing tests passed.