docs: add a GitHub issue template for feature request

.github/ISSUE_TEMPLATE/2-feature-request.yml

@@ -0,0 +1,33 @@
+name: "✨ Feature Request"
+description: Suggest a feature or enhancement to improve Planka.
+labels: ["Type: Idea"]
+body:
+  -   type: dropdown
+      id: idea-type
+      attributes:
+        label: Is this a feature for the backend or frontend?
+        multiple: true
+        options:
+          - Backend
+          - Frontend
+      validations:
+        required: true
+  -   type: textarea
+      id: feature
+      attributes:
+        label: What would you like?
+        description: A clear description of the feature or enhancement wanted.
+        placeholder: I'd like to be able to...
+      validations:
+        required: true
+  -   type: textarea
+      id: reason
+      attributes:
+        label: Why is this needed?
+        description: A clear description of why this would be useful to have.
+        placeholder: I want this because...
+  -   type: textarea
+      id: other
+      attributes:
+        label: Other information
+        placeholder: Any other details?