Feature Request Issue Template (#39473)

* Feature Request Issue Template

* Update 20_feature_request.yml

Author: TanayParikh

.github/ISSUE_TEMPLATE/20_feature_request.md

@@ -0,0 +1,35 @@
+name: 💡 Feature request
+description: Suggest an idea for this project
+body:
+- type: markdown
+  attributes:
+    value: |
+      More information on our issue management policies can be found here: https://aka.ms/aspnet/issue-policies
+- type: checkboxes
+  attributes:
+    label: Is there an existing issue for this?
+    description: Please search to see if an issue already exists for the feature you are requesting. (https://github.com/dotnet/aspnetcore/issues).
+    options:
+    - label: I have searched the existing issues
+      required: true
+- type: textarea
+  attributes:
+    label: Is your feature request related to a problem? Please describe the problem.
+    description: A clear and concise description of what the problem is.
+    placeholder: I am trying to do [...] but [...]
+  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. Include any alternative solutions you've considered.
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: Additional context
+    description: |
+      Add any other context or screenshots about the feature request here.
+  validations:
+    required: false