chore: Convert issue templates to issue forms (#875)

Signed-off-by: Marco Kilchhofer <mkilchhofer@users.noreply.github.com>

.github/ISSUE_TEMPLATE/feature_request.yaml

@@ -0,0 +1,35 @@
+---
+name: Feature request
+description: Suggest an idea for this project
+labels:
+- enhancement
+body:
+- type: textarea
+  attributes:
+    label: Is your feature request related to a problem?
+    description: A clear and concise description of what the problem is. Please describe.
+    placeholder: |
+      Ex. I'm always frustrated when [...]
+  validations:
+    required: false
+
+- type: textarea
+  attributes:
+    label: Describe the solution you'd like
+    description: A clear and concise description of what you want to happen.
+  validations:
+    required: true
+
+- type: textarea
+  attributes:
+    label: Describe alternatives you've considered
+    description: A clear and concise description of any alternative solutions or features you've considered.
+  validations:
+    required: false
+
+- type: textarea
+  attributes:
+    label: Additional context
+    description: Add any other context or screenshots about the feature request here.
+  validations:
+    required: false