Epics template (#4202)

* Add epic template

* Add epic template

* Add epic template

* Improve text

.changeset/perfect-jobs-type.md

@@ -0,0 +1,5 @@
+---
+"saleor-dashboard": patch
+---
+
+Introduce epic template

.github/ISSUE_TEMPLATE/epic_request.yml

@@ -0,0 +1,30 @@
+name: Epic request
+description: Publish a new group of issues
+title: "[Epic]: "
+labels: ["epic"]
+
+body:
+  - type: textarea
+    id: description
+    attributes:
+      label: Description of an epic
+      description: Describe overall goal, provide context, explain what goal it represents
+      placeholder: |
+        Example: Users needs to have variant edition functionality. This is essential for managing eCommerce and needs lots of configuration for each variant.
+        We must consider its attributes, quantities, correlated channels and more. 
+    validations:
+      required: true
+  - type: textarea
+    id: additional-info
+    attributes:
+      label: Additional information
+      description: Attach some additional context.
+      placeholder: |
+        Example:
+        Here are the example mockups for variant edition.
+        Let's consider what options it supposed to have.
+        Please look at the attached references - it explains how marked use it.
+        ...
+    validations:
+      required: false
+

.github/stale.yml

@@ -12,6 +12,7 @@ onlyLabels: []
 
 # Issues or Pull Requests with these labels will never be considered stale. Set to `[]` to disable
 exemptLabels:
+  - epic
   - triage
   - bug
   - blocker