add pr template.

Signed-off-by: sunhaizhou <sunhaizhou@kingsoft.com>

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,33 @@
+<!--  Thanks for sending a pull request!  Here are some tips for you:
+
+1. If this is your first time, please read our contributor guidelines: https://github.com/kubeedge/sedna/blob/main/CONTRIBUTING.md
+2. Ensure you have added or ran the appropriate tests for your PR
+
+-->
+
+**What type of PR is this?**
+
+<!--
+Add one of the following kinds:
+/kind bug
+/kind cleanup
+/kind documentation
+/kind feature
+/kind test
+/kind design
+
+Optionally add one or more of the following kinds if applicable:
+/kind api-change
+/kind failing-test
+-->
+
+
+**What this PR does / why we need it**:
+
+**Which issue(s) this PR fixes**:
+<!--
+*Automatically closes linked issue when PR is merged.
+Usage: `Fixes #<issue number>`, or `Fixes (paste link of issue)`.
+_If PR is about `failing-tests or flakes`, please post the related issues/tests in a comment and do not use `Fixes`_*
+-->
+Fixes #