Update M- Components to Storybook CSF3

[MMFane]

What Was Changed

Common to all CSF3 updates

• Replaced now-defunct CSF 1 & 2 types ComponentStory and ComponentMeta with StoryObj and Meta respectively
• Updated all stories to the new single-const format
• Removed titles from ungrouped components whose name is the same as their filename
• Created Story type and added it to all stories for increased type safety

Unique to this PR

• Menu
  • Added Title, Gutter, and usePortal stories
  • Increased height to show whole menu in non-portal stories
• MenuItem
  • Unlike in List (#383) and DescriptionList (#377), I decided to keep MenuItem stories separate, because Menu had enough of its own stories that didn't rely on the different stylings of MenuItem that putting them all together felt a little cluttered and confusing.
• Refined the custom header styling in Modal

Screenshots

Menu Height Increase

Before	After

New Menu Stories

Custom Header in Modal

Before	After

[github-actions[bot]]

:tada: This PR is included in version 5.1.5 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: