[iOS only] Feat: Add the way to customize iOS cropper toolbar

[anton-patrushev]

What's new

This PR adds a way to customize iOS cropper toolbar using custom (HEX only) colors for the toolbar buttons (Choose and Cancel).

Demo

If I would pass custom colors to openCropper or openPicker it would apply provided colors
openCropper example:

async function launchCropper() {
  const imageUri: string = await SomeImageUtils.openPicker();

  return await ImageCropper.openCropper({
    path: imageUri,
    mediaType: 'photo',
    cropperChooseColor: '#00E78A',
    cropperCancelColor: '#FFFFFF',
  });
}

or openPicker example:

async function launchPicker() {
  return await ImageCropper.openPicker({
    cropperChooseColor: '#00E78A',
    cropperCancelColor: '#FFFFFF',
  });
}

And if I would not pass any custom colors it would fallback to default values
openCropper example:

async function launchCropper() {
  const imageUri: string = await SomeImageUtils.openPicker();

  return await ImageCropper.openCropper({
    path: imageUri,
    mediaType: 'photo'
  });
}

or openPicker example:

async function launchPicker() {
  return await ImageCropper.openPicker();
}

How it was tested

It was manually QA in iOS Simulator (iOS 15 and iOS 16)

[anton-patrushev]

@ivpusic can you take a look please?

[ivpusic]

tnx for PR! could you update readme file with new options?

[anton-patrushev]

sure! no problems @ivpusic

[anton-patrushev]

@ivpusic
README file was updated here 2dca3e3

Can you approve this PR and release a new version, please?

[ivpusic]

tnx!

[anton-patrushev]

Would you make a new release cut (0.40.0 or 0.39.1 or even 1.0.0)? @ivpusic

[Blackfaded]

I would also love a new version on npm.
Was a little bit confused why the colors did not apply in my app, because the docs are updated to 0.40.0, but the package on npm is still 0.39.

Btw: Thanks for this awesome lib!

[ivpusic]

0.40.0 released to npm