API docs for additional components

[jattasNI]

Pull Request

🤨 Rationale

Ongoing efforts towards #824. This PR builds on #2132 and covers these components:

• tree
• toolbar
• icon
• dialog
• drawer
• spinner
• breadcrumb
• theme provider

👩‍💻 Implementation

Mostly following established patterns. Interesting bits:

• moved a nimble-components/src/dialog/tests/types.ts to the storybook package since it iss only used by storybook
• collapsed 2 controls into 1 in the dialog story
• added a new table section called Styles for controls that impact CSS
• removed "allowNavigation" capability from breadcrumb story because it was just showing native event behavior (i.e. how to cancel an event) and didn't have any documentation
• moved "Target Configuration" section under the relevant component API section for several components.

🧪 Testing

Storybook inspection

✅ Checklist

• [x] I have updated the project documentation to reflect my changes or determined no changes are needed.

[jattasNI]

@m-akinc can you buddy this next round? I tried to apply the best practices you suggested in the last PR for new docs here, but didn't address any of the storybook-wide suggestions tracked by #824 yet.

[jattasNI]

Bypassing reviewer policy due to OOO