Update user feedback to common (#3467)

* initial refactor to add http method to common

* add dotnet

* update stale link

* modify include directory name

* modify dotnet to point to aspnet and aspnetcore as needed

* fix broken links

Author: PeloWriter

src/includes/user-feedback-example-widget/_default.mdx renamed to src/includes/user-feedback/example-widget/_default.mdx

@@ -0,0 +1,24 @@
+Make sure you've got the JavaScript SDK available:
+
+```html
+<script
+  src="https://browser.sentry-cdn.com/{{ packages.version('sentry.javascript.browser') }}/bundle.min.js"
+  integrity="sha384-{{ packages.checksum('sentry.javascript.browser', 'bundle.min.js', 'sha384-base64') }}"
+  crossorigin="anonymous"
+></script>
+```
+
+You'll then need to call `showReportDialog` and pass in the generated event ID.
+This event ID is returned from all calls to <PlatformIdentifier
+name="capture-event" /> and <PlatformIdentifier name="capture-exception" />.
+There is also a function called <PlatformIdentifier name="last-event-id" />
+that returns the ID of the most recently sent event.
+
+```html
+<script>
+  Sentry.init({ dsn: "___PUBLIC_DSN___" });
+  Sentry.showReportDialog({
+    eventId: "{{ event_id }}",
+  });
+</script>
+```