Add storybook.new to issue template

[IanVS]

Closes #

What I did

Adds a link to storybook.new to the issue template.

I kept the existing instructions as well, in case folks prefer to create a new repo manually.

We might want to also mention it in https://storybook.js.org/docs/react/contribute/how-to-reproduce, but I'll leave that up to @jonniebigodes.

How to test

Checklist

• Make sure your changes are tested (stories and/or unit, integration, or end-to-end tests)
• Make sure to add/update documentation regarding your changes
• If you are deprecating/removing a feature, make sure to update
  MIGRATION.MD

Maintainers

• If this PR should be tested against many or all sandboxes,
  make sure to add the ci:merged or ci:daily GH label to it.
• Make sure this PR contains one of the labels below.

["cleanup", "BREAKING CHANGE", "feature request", "bug", "documentation", "maintenance", "dependencies", "other"]

[JReinhold]

Nice!

[jonniebigodes]

This looks great. Thanks for taking the time @IanVS , I'll follow up on it and update the how-to reproduce docs.