replace markdown templates with yaml forms

.gitea/ISSUE_TEMPLATE/feature_request.yaml

@@ -0,0 +1,34 @@
+name: Feature Request
+about: Suggest an idea for this project
+title: ""
+labels: "Kind/Feature"
+ref: main
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to suggest an idea to us!
+  - type: textarea
+    id: feature-description
+    attributes:
+      label: Is your feature request related to a problem?
+      description: A clear and concise description of what the problem is.
+      render: markdown
+      value: " I'm always frustrated when [...]"
+  - type: textarea
+    id: feature-solution
+    attributes:
+      label: Describe the solution you would like.
+      description: "A clear and concise description of what you want to happen. Context and screenshots welcome!"
+      value: |
+        1. Go to '...'
+        2. Look at '....'
+        3. Change to '....'
+    validations:
+      required: true
+  - type: textarea
+    id: feature-references
+    attributes:
+      label: Describe the alternatives you have considered.
+      description: "A clear and concise description of any alternative solutions or features you've considered."
+      render: markdown