Add issue templates

Added issue templates to aid with the structural submission of issues.

.github/ISSUE_TEMPLATE/performance_issue.yaml

@@ -0,0 +1,33 @@
+name: Performance Issue
+description: Report slow performance or memory issues when running DarkflameServer
+title: "PERF: "
+labels: ["performance", "triage"]
+
+body:
+  - type: checkboxes
+    id: checks
+    attributes:
+      options:
+        - label: >
+            I have checked that this issue has not already been reported.
+          required: true
+        - label: >
+            I have pulled the latest version of the main branch of DarkflameServer and have confirmed that the issue exists there.
+          required: true
+  - type: textarea
+    id: example
+    attributes:
+      label: Reproducible Example
+      description: >
+        Please provide a minimal, example that quantifies slow runtime or memory issues. 
+        Ideally include screenshots of CPU usage or memory usage. And if possible point
+        to the code that you may suspect to cause the issue.
+    validations:
+      required: true
+  - type: textarea
+    id: prior-performance
+    attributes:
+      label: Prior Performance
+      description: >
+        If applicable, please provide the prior version of DarkflameServer and output
+        of the same reproducible example where the performance issue did not exist.