fix(crepe): button type in toolbar

[TorstenDittmann]

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Summary

• using the crepe bundle inside a form triggers a submit when a button in the toolbar is pressed
• the default type of a button is submit, changing it to type button prevents this
• there are potentially more cases of a missing button type, but didn't wanna explode the scope of this pr

How did you test this change?

• checked on storybook that crepe stories are rendering and also that type="button" is present

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Latest commit: e704287

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Name	Status	Preview	Comments	Updated (UTC)
milkdown-storybook	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Oct 4, 2024 0:29am

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