#7785034 Plans 2023 : Adds the tooltip component,and some examples of the usage of the tooltip

Proposed Changes

• Adds the initial tooltip component
• Showcases a few examples of a few tooltips in operation

Please Note The Following Caveats

• All of the tooltips have not been added in this PR and will be added by a separate change (Automattic/martech#1460) . This PR is shipped prematurely to unblock any other developers that want to use the tooltip.

Testing Instructions

• Go to /start/plans?flags=onboarding/2023-pricing-grid
• Make sure the tooltip popover works by hovering over Storage or any other features that have been provided with a feature explanation

Pre-merge Checklist

• Has the general commit checklist been followed? (PCYsg-hS-p2)
• Have you written new tests for your changes?
• Have you tested the feature in Simple (P9HQHe-k8-p2), Atomic (P9HQHe-jW-p2), and self-hosted Jetpack sites (PCYsg-g6b-p2)?
• Have you checked for TypeScript, React or other console errors?
• Have you used memoizing on expensive computations? More info in Memoizing with create-selector and Using memoizing selectors and Our Approach to Data
• Have we added the “[Status] String Freeze” label as soon as any new strings were ready for translation (p4TIVU-5Jq-p2)?
• For changes affecting Jetpack: Have we added the “[Status] Needs Privacy Updates” label if this pull request changes what data or activity we track or use (p4TIVU-ajp-p2)?

Related to #
Fixes Automattic/martech#1390