fix: make fontSize optional

[TheAlexLichter]

According to the docs, fontSize is an optional property. This should be reflected in the types as well.

[github-actions]

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[TheAlexLichter]

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[lee00678]

@TheAlexLichter thanks for the fix!

[rokotyan]

@TheAlexLichter (@lee00678)

I'm not confident that this property is optional, how did you come to your conclusion?

Looking at the getWrappedText function, the fontSize property doesn't seem to be optional

[lee00678]

@TheAlexLichter (@lee00678)

I'm not confident that this property is optional, how did you come to your conclusion?

Looking at the getWrappedText function, the fontSize property doesn't seem to be optional.

I haven't got a chance to review this PR. But I'm also open to make it an optional property.

[TheAlexLichter]

@rokotyan Given this example in the docs (and others) not adding explicit fontSize values.

unovis/packages/website/docs/auxiliary/Annotations.mdx

Lines 102 to 116 in 79f45dd

	### Styled Text
	To customize font or color of your text, provide `content` with an object of type `UnovisText`.
	In this case, you put the desired string content to the `text` property,
	and additional properties can be set.
	```ts
	items = [{
	content: { text: 'Item 2', color: 'red' }
	}]
	```
	<XYWrapper {...annotationsProps()} excludeTabs showAxes items={[
	{ content: { text: 'Item 2', color: 'red' } }
	]}/>

And that there are defaults in

unovis/packages/ts/src/styles/index.ts

Line 13 in 79f45dd

fontSize: 12,