feat(checkbox): refactor checkbox component

[samrichardsontylertech]

PR Checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added/updated: Y
• Docs have been added/updated: Y
• Does this PR introduce a breaking change? Y
• I have linked any related GitHub issues to be closed when this PR is merged? Y

Describe the new behavior?

Removed Material dependencies from the checkbox component, added a toggle method, added tokens and new animations, set up element internals, refined the base form interface/class and forwarding/reflection utilities, and fixed related bugs around the state layer, focus indicator, and switch components.

Closes #370

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[DRiFTy17]

Things are looking good, just a couple questions/comments:

When a slotted <input> is used, can we have it automatically add the slot="input" attribute when initializing the adapter if one doesn't exist? This makes it easier to use, but on top of that we can improve performance because it can immediately initialize against the slotted <input> instead as well regardless:

const slottedInput = this._component.querySelector('input[type=checkbox]:not([slot])') as HTMLInputElement;
 if (slottedInput) {
   slottedInput.slot = 'input';
 }

Additionally, I know you're probably waiting until the end, but we should update the delegate as well included tests for anything that is missing to improve coverage.

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🚀 PR was released in v3.0.0-next.13 🚀