build(gh): improve Issue / Discussion templates with form schema

.github/DISCUSSION_TEMPLATE/general.yml

@@ -0,0 +1,26 @@
+body:
+  - type: checkboxes
+    attributes:
+      label: Checklist
+      description: Following the guidelines can make you more likely to get responses.
+      options:
+        - label: >-
+            I'm willing to follow the 
+            [Contributing Guidelines](https://github.com/cotes2020/jekyll-theme-chirpy/blob/master/docs/CONTRIBUTING.md).
+          required: true
+
+  - type: dropdown
+    attributes:
+      label: What is the topic?
+      options:
+        - Sharing tips and tricks
+        - Just chatting
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Description
+      description: Please describe in detail what you want to share.
+    validations:
+      required: true