Add design contest template

Author: derickr

.github/ISSUE_TEMPLATE/design-contest.yml

@@ -0,0 +1,51 @@
+name: "PHP 8.5 Release Page Design Content Submission"
+description: "Submit your design for the PHP 8.5 Release Page"
+labels: ["Design Contest"]
+
+body:
+  - type: textarea
+    id: rationale
+    attributes:
+      label: "Rationale (300-600 words)"
+      description: |
+        Explain information hierarchy, layout choices, and how the design meets
+        goals.
+    validations:
+      required: true
+
+  - type: markdown
+    id: screenshot
+    attributes:
+      value: |
+        # Screenshots
+
+        You must add 3 to 5 screenshots to this submission.
+
+  - type: textarea
+    id: team
+    attributes:
+      label: "Names and Contact Details"
+      description: "Please provide your contact details"
+    validations:
+      required: true
+
+  - type: input
+    id: links
+    attributes:
+      label: "Link to mockup/prototype"
+      description: "Please provide a link to the mockup or prototype if available."
+      placeholder: "https://example.com/my-design.html"
+    validations:
+      required: true
+
+  - type: checkboxes
+    id: license
+    attributes:
+      label: "License"
+      description: |
+        Submissions must be original. If selected, I agree to license it under
+        the [same terms as the php.net website](https://www.php.net/copyright.php) and allow
+        adaptations for implementation.
+      options:
+        - label: "I confirm, and agree."
+          required: true