Add feature request template for GitHub issues

Author: edwardchalstrey1

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,18 @@
+name: Feature Request
+description: Suggest a new feature or improvement to the Gambit website.
+title: "[Feature]: "
+labels: ["feature"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this feature request!
+  - type: textarea
+    id: request-details
+    attributes:
+      label: What feature or improvement to the Gambit website would you like to see?
+      description: Please provide details about the feature or improvement you would like to see.
+      placeholder: Describe the feature or improvement in detail.
+      value: "A feature or improvement suggestion!"
+    validations:
+      required: true