[terra-toggle] [spike] deprecate terra-toggle?

[mjhenkes]

Feature Request

Description

terra-toggle should be replace with either the show hide component or a button with a popover disclosure.

We need an audit and a spike on usage to understand if this should be an abstract concept for us to keep. It seems like the component is in search of stricter definition to inform consumers of how this component is intended to be used.

• update the repo readme and badge

• update any of the component doc pages, using the notices component. In this case, the maintenance notice variant would be appropriate with similar phrasing as used for terra-application-navigation

• update the component readme (using just straight markdown), update the badge
  adding an independent deprecation guide doc page. This doc should contain what deprecation means, why we've made the change and how consumers should move forward.

After PR

• npm deprecate with a message (we should use the exact same message as what is in our notices component on the main doc pages so these match, plus also on the component readme.md - all can link to our deprecation guide doc).

Audit #3064

Additional Context / Screenshots

@ Mentions

[stale]

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