Add FPT issue template (#35401)

.github/ISSUE_TEMPLATE/frontend_platform_issue.yaml

@@ -0,0 +1,61 @@
+name: Frontend Platform issue
+description: Create an issue that is automatically added to the Frontend Platform team's project board
+labels:
+- 'team/frontend-platform'
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for helping us improve the frontend platform at Sourcegraph!
+  - type: dropdown
+    id: issue-type
+    attributes:
+      label: Issue type
+      description: What type of issue is this?
+      options:
+        - Bug fix
+        - Customer request
+        - Internal request
+    validations:
+      required: true
+  - type: textarea
+    id: brief-description
+    attributes:
+      label: Problem description
+      description: At a high level, what is the problem that needs solving?
+    validations:
+      required: true
+  - type: textarea
+    id: detailed-description
+    attributes:
+      label: Context
+      description: What background or detail do we need in order to understand the issue?
+    validations:
+      required: true
+  - type: textarea
+    id: repro-steps
+    attributes:
+      label: Steps to reproduce
+      description: If this issue is for a bug fix, how do we reproduce the problem?
+    validations:
+      required: false
+  - type: textarea
+    id: impact-level
+    attributes:
+      label: Impact
+      description: Who does this issue impact and how?
+    validations:
+      required: false
+  - type: textarea
+    id: additional-details
+    attributes:
+      label: Additional details
+      description: Please provide any notes, screenshots, and/or additional context that will help us prioritize the problem.
+    validations:
+      required: false
+  - type: checkboxes
+    id: labels
+    attributes:
+      label: Assigning labels
+      options:
+      - label: If this issue will require input from designers in order to complete, please assign the label `needs-design`.