docs: demo restoreFocus with controlled menu [ DO NOT MERGE! ]

[ze-flo]

FOR DEMO PURPOSES ONLY - DO NOT MERGE ❗

Description

Adds a "Controlled + Managed Focus" Story to demo the restoreFocus behavior featured in #659 with a controlled menu.

[coveralls]

coverage: 95.714% (-0.002%) from 95.716%
when pulling f43e450 on ze-flo/menu-restore-focus
into ec77a9d on main.

[jzempel]

Feels like moving this to a "Controlled trigger focus" story (using all of the standard code constructs) under the "[patterns]" section would be a valuable addition to #659 so we can easily track the behavior going forward. Compare with many of the other "[pattern]" stories – many/all of the arg controls can be removed.

[ze-flo]

Feels like moving this to a "Controlled trigger focus" story (using all of the standard code constructs) under the "[patterns]" section would be a valuable addition to #659 so we can easily track the behavior going forward. Compare with many of the other "[pattern]" stories – many/all of the arg controls can be removed.

In the interest of time and to unblock #659, is it okay to add the new [patterns] story in a follow-PR?

[jzempel]

Feels like moving this to a "Controlled trigger focus" story (using all of the standard code constructs) under the "[patterns]" section would be a valuable addition to #659 so we can easily track the behavior going forward. Compare with many of the other "[pattern]" stories – many/all of the arg controls can be removed.

In the interest of time and to unblock #659, is it okay to add the new [patterns] story in a follow-PR?

Definitely works for me.

[ze-flo]

The restoreFocus story will be added under the Menu's [pattern] section. Closing PR but keeping branch.