meta: replace feature request template with form

The bug report form doesn't seem to result in many invalid/spam reports,
but the template still results in lots of issues opened by apparent bots
that don't modify the default template imput. Change the feature request
template to a form to hopefully better serve people proposing features
and reduce bot-generated junk issues.

PR-URL: #41317
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>

.github/ISSUE_TEMPLATE/1-bug-report.yml

@@ -9,7 +9,7 @@ body:
         This issue tracker is for bugs and issues found within Node.js core.
         If you require more general support please file an issue on our help repo. https://github.com/nodejs/help
 
-        Please fill in as much of the form below as you're able.
+        Please fill in as much of the following form as you're able.
   - type: input
     attributes:
       label: Version

.github/ISSUE_TEMPLATE/2-feature-request.yml

@@ -0,0 +1,19 @@
+name: "\U0001F680 Feature request"
+description: Suggest an idea for this project
+labels: ["feature request"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thank you for suggesting an idea to make Node.js better.
+
+        Please fill in as much of the following form as you're able.
+  - type: textarea
+    attributes:
+      label: What is the problem this feature will solve?
+  - type: textarea
+    attributes:
+      label: What is the feature you are proposing to solve the problem?
+  - type: textarea
+    attributes:
+      label: What alternatives have you considered?