chore(github): Added PULL_REQUEST_TEMPLATE.md

Author: jcjimenez

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,21 @@
+*Issue #, if available:*
+
+*Description of changes:*
+
+*Check points: (check or cross out if not relevant)*
+
+- [ ] Added new tests to cover change, if needed
+- [ ] Build succeeds with all target using Swift Package Manager
+- [ ] All unit tests pass
+- [ ] All integration tests pass
+- [ ] Security oriented best practices and standards are followed (e.g. using input sanitization, principle of least privilege, etc)
+- [ ] Documentation update for the change if required
+- [ ] PR title conforms to conventional commit style
+- [ ] If breaking change, documentation/changelog update with migration instructions
+
+*DataStore checkpoints (check when completed)*
+
+- [ ] Ran AWSDataStorePluginIntegrationTests (includes V2 and CPK)
+- [ ] Ran AWSDataStorePluginAuthIntegrationTests (includes MultiAuth, Cognito Auth, IAM Auth)
+
+By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.