docs: add Performance template

Author: JoshuaKGoldberg

.github/ISSUE_TEMPLATE/05-performance.yaml

@@ -0,0 +1,25 @@
+name: "⚡️ Performance"
+description: "Report an issue or request a feature for improved runtime game performance"
+title: "⚡️ Performance: <short description of the request>"
+labels:
+    - "area: performance"
+body:
+    - attributes:
+          description: If any of these required steps are not taken, we may not be able to review your issue. Help us to help you!
+          label: Performance Report Checklist
+          options:
+              - label: I have pulled the latest `main` branch of the repository.
+                required: true
+              - label: I have [searched for related issues](https://github.com/FullScreenShenanigans/EightBittr/issues?q=is%3Aissue+label%3A%22area%3A+performance%22) and found none that matched my issue.
+                required: true
+      type: checkboxes
+    - attributes:
+          description: What would you like to report?
+          label: Overview
+      type: textarea
+      validations:
+          required: true
+    - attributes:
+          label: Additional Info
+          description: Any additional info you'd like to provide.
+      type: textarea