add ability to style states of disabled toggle

[steppy452]

PR Checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[x] Feature
[ ] Code style update (formatting, local variables)
[x] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

Issue Number: N/A
Disabled state for Toggle only had one class

What is the new behavior?

Disabled state for Toggle can now be separated into base (toggle is off) and checked states

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

Also updated the Toggle disabled story to include both states of disabled Toggles

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[amcdnl]

Lets figure out best naming standard. Also lets document that in the docs around best practices.

[steppy452]

doesn't seem like this is needed anymore