Create PULL_REQUEST_TEMPLATE.md

From https://github.com/Harsha200105/DesktopAssistant/pull/51

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,21 @@
+# Description
+
+Fixes #(issue)
+
+## Type of change
+
+- [ ] Bug fix (non-breaking change which fixes an issue)
+- [ ] User Interface
+- [ ] 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
+
+
+# Checklist:
+
+- [ ] My code follows the style guidelines of this project
+- [ ] I have performed a self-review of my own code
+- [ ] I have commented my code, particularly in hard-to-understand areas
+- [ ] My changes generate no new warnings
+
+# Screenshots (if any)