chore: add pull request template

Signed-off-by: cxhello <caixiaohuichn@gmail.com>

Author: cxhello

.github/pull_request_template.md

@@ -0,0 +1,21 @@
+### What type of PR is this?
+
+- [ ] Bug fix
+- [ ] New feature
+- [ ] Enhancement
+- [ ] Refactoring
+- [ ] Documentation
+- [ ] CI/CD
+- [ ] Other
+
+### What does this PR do?
+
+<!-- A brief description of the changes. -->
+
+### Which issue(s) does this PR fix?
+
+<!-- Link to the related issue(s). e.g., Fixes #123 -->
+
+### How has this been tested?
+
+<!-- Describe the testing you have done. -->