Add issue templates (thanks z-huang/music)

.github/ISSUE_TEMPLATE/feature_request.yaml

@@ -0,0 +1,34 @@
+name: Feature request
+description: Suggest an idea for ViMusic
+labels: [enhancement]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        **1- I've checked that there is no other issue about this feature request.**
+        **2- This issue contains only one feature request.**
+        **3- The title of this issue accurately describes the feature request.**
+
+  - type: textarea
+    id: feature-description
+    attributes:
+      label: Feature description
+      description: What feature you want the app to have? Provide detailed description about what it should look like or where it should be added.
+    validations:
+      required: true
+
+  - type: textarea
+    id: why-is-the-feature-requested
+    attributes:
+      label: Why do you want this feature?
+      description: Describe the problem or limitation that motivates you to want this feature to be added.
+    validations:
+      required: true
+
+  - type: textarea
+    id: additional-information
+    attributes:
+      label: Additional information
+      description: Add any other context or screenshots about the feature request here.
+      placeholder: |
+        Additional details and attachments.