feat: Adding pull request template

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,29 @@
+<!-- Thanks for submitting a pull request! Please provide enough information so that others can review your pull request. -->
+<!-- Explain the **motivation** for making this change. What existing problem does the pull request solve? -->
+**IMPORTANT: Please do not create a Pull Request without creating an issue first.**
+
+*Any change needs to be discussed before proceeding. Failure to do so may result in the rejection of the pull request.*
+
+<!-- Thanks for submitting a pull request! Please provide enough information so that others can review your pull request. -->
+<!-- You can skip this if you're fixing a typo or adding an app to the Showcase.  -->
+<!-- Explain the **motivation** for making this change. What existing problem does the pull request solve? -->
+
+
+<!-- In addition to that please answer these questions: -->
+
+**What kind of change does this PR introduce?**
+
+<!-- E.g. a bugfix, feature, refactoring, build related change, etc… -->
+
+**Does this PR introduce a breaking change?**
+
+<!-- If this PR introduces a breaking change, please describe the impact and a migration path for existing applications. -->
+
+**What needs to be documented once your changes are merged?**
+
+<!-- List all the information that needs to be added to the documentation after merge -->
+<!-- When your changes are merged you will be asked to contribute this to the documentation -->
+
+**Closing issues**
+
+Put `closes #XXXX` in your comment to auto-close the issue that your PR fixes (if such).