(improvement)(github) Optimize the question template. (#1255)

.github/ISSUE_TEMPLATE/enhancement_request.yml

@@ -0,0 +1,57 @@
+name: SuperSonic enhancement
+description: Add an enhanment for SuperSonic
+title: "[Enhancement] "
+labels: enhancement
+
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thank you very much for your good enhancement for SuperSonic.
+  - type: checkboxes
+    attributes:
+      label: Search before asking
+      description: >
+        Please make sure to search in the [issues](https://github.com/tencentmusic/supersonic/issues?q=is%3Aissue) first to see
+        whether the same issue was reported already.
+      options:
+        - label: >
+            I had searched in the [issues](https://github.com/tencentmusic/supersonic/issues?q=is%3Aissue) and found no similar
+            issues.
+          required: true
+
+  - type: textarea
+    attributes:
+      label: Description
+      description: Describe the enhancement what you want, including motivation if it exists.
+
+  - type: textarea
+    attributes:
+      label: Solution
+      placeholder: >
+        Add overview of proposed solution. 
+
+        Add related materials like links if they exist.
+
+  - type: checkboxes
+    attributes:
+      label: Are you willing to submit PR?
+      description: >
+        We very much look forward to developers or users to help develop the SuperSonic together.
+        If you are willing to submit a PR to implement this feature, please tick it.
+      options:
+        - label: Yes I am willing to submit a PR!
+
+  - type: checkboxes
+    attributes:
+      label: Code of Conduct
+      description: The Code of Conduct helps create a safe space for everyone. We require that everyone agrees to it.
+      options:
+        - label: >
+            I agree to follow this project's
+            [Code of Conduct](https://www.apache.org/foundation/policies/conduct)
+          required: true
+
+  - type: markdown
+    attributes:
+      value: "Thanks for completing our form!"