ci: add roadmap item label and template

.github/ISSUE_TEMPLATE/roadmap_item.yml

@@ -0,0 +1,11 @@
+name: Roadmap item
+description: Feature to be implemented
+labels: [roadmap]
+body:
+  - type: textarea
+    id: description
+    attributes:
+      label: What's the item?
+      description: Describe the feature/item meant to be implemented in the future.
+    validations:
+      required: true

.github/labels.yml

@@ -42,3 +42,6 @@
 - name: help wanted
   color: 333a54
   description: Extra attention is needed
+- name: roadmap
+  color: d64a00
+  description: Planned to implement task/feature