feat: add font feature settings support

[stefanwittwer]

Implements #2155.

This PR adds the fontFeatureSettings style property (see MDN for the CSS equivalent). It takes a list of feature tags, which appends to the default set, or an object to turn on/off individual features, as supported by fontkit.

Why it matters

This allows users to apply any font features supported by a given font, such as tabular numbers, fractions, alternate glyphs, control over ligatures, etc.

Usage

const styles = StyleSheet.create({
  numeric: {
    fontFeatureSettings: ['tnum'],
  }
});

Example

A full example is provided in the examples package. Here's how it looks like:

[changeset-bot]

🦋 Changeset detected

Latest commit: 3bd1a79

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 12 packages

Name	Type
@react-pdf/textkit	Minor
@react-pdf/layout	Minor
@react-pdf/types	Minor
@react-pdf/render	Patch
@react-pdf/renderer	Patch
@react-pdf/font	Patch
@react-pdf/stylesheet	Patch
next-14	Patch
next-15	Patch
@react-pdf/vite-example	Patch
@react-pdf/e2e-node-cjs	Patch
@react-pdf/e2e-node-esm	Patch

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[stefanwittwer]

I'm of course also happy to extend the documentation site accordingly if this will be merged, I'd just need a pointer as to where I could contribute that.

[bdkopen]

I'm of course also happy to extend the documentation site accordingly if this will be merged, I'd just need a pointer as to where I could contribute that.

The website documentation is kept in the react-pdf-site repository.

[samueldrai]

Hi!
Any news about this issue? Happy to help if needed :)

[samueldrai]

Up!
Any update on this? Happy to help :)

[stefanwittwer]

I'm also happy to change anything needed for this to be merged :) Is there a process for getting this PR reviewed?

[samueldrai]

If anything can be done to merge this PR, please reach out. :)

[samueldrai]

Up, is there anything I can do to help this PR being merged? :)

[bnlb]

This PR would help my team. Happy to help write documentation or assist where I can if it'd help get this approved.

[samueldrai]

Same as @bnlb. Happy to help for testing or writing docs :)

[stefanwittwer]

@diegomura Any pointers on how to get this PR reviewed? :)

[samueldrai]

Hi!
Any updates on this PR being merged? As usual, feel free to reach out if you need any help :)

[samueldrai]

Hi!

Happy new year :)

Any updates on this PR? As always, more than happy to help however I can!

[samueldrai]

Hi!
Any updates on this PR? Happy to contribute or help (docs, tests or anything else)>
@diegomura @stefanwittwer

[samueldrai]

Hi!
Any updates on this PR? Always happy to help if needed. :)

[stefanwittwer]

This PR was a bit out of date by now, so I integrated all latest changes into it and resolved the conflicts.
Everything works again, as can be seen in the associated example.

@diegomura Just let me know there's anything else I can do to help the maintainers out here, or if there are any other blockers before it can be reviewed :)

Support for tabular numbers with this would be extremely useful for use cases where react-pdf is used to generate reports, etc. Worth noting also that everything needed here was already supported out-of-the-box by Fontkit, so this addition should not stand in the way of the goal of merging the PDFKit fork with the original.