Block Style Tab: Refactor setting panel to use ToolsPanel

[shimotmk]

What?

Part of #67813

Make the settings panel more consistent with other blocks

Testing Instructions

1. Insert a paragraph block
2. Open the Style panel
3. You can see that you can set and clear the settings in the Tools panel.

Testing Instructions for Keyboard

Screenshots or screencast

Before

before.mp4

After

after.mp4

[github-actions]

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Co-authored-by: shimotmk <[email protected]>
Co-authored-by: t-hamano <[email protected]>
Co-authored-by: Mamaduka <[email protected]>

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[t-hamano]

Thanks for the PR, @shimotmk!

@fabiankaegy @Mamaduka As #67813 is nearing the end, shall we check the refactoring targets and remaining tasks? I personally considered the Styles panel to be out of scope 🤔

[Mamaduka]

Agreed. The Styles panel isn't part of #67813. Consumers won't be able to add any additional items to it, and using the ToolsPanel doesn't change anything besides the design.

I think the Styles and the Advanced panel should be evaluated separately. Probably leave them as they are for now, unless they're redesigned.

[t-hamano]

Let's close this PR.

@shimotmk apologize for not being clear on the scope of work, but I appreciate your efforts!