Ueno: add theme

[jffng]

Changes proposed in this Pull Request:

Adds new theme designed by @beafialho

To-do:

• The default style’s typography is meant to be uppercase everywhere but the two variations are meant to be regular case. I defined it but after saving the variations, the text still showed up uppercase in all of them.
• Duotone in images. Ueno Dark is supposed to use a duotone effect in all images, which also didn’t apply:

[beafialho]

Sorry about the extra detail, but is it possible to set this color on links hover for the Dark Variation?

[vcanales]

@beafialho, getting back to your comments, they should be resolved on my end.

• The default style’s typography is meant to be uppercase everywhere but the two variations are meant to be regular case. I defined it but after saving the variations, the text still showed up uppercase in all of them.

style-caps.mov

• Duotone in images. Ueno Dark is supposed to use a duotone effect in all images, which also didn’t apply.

I found that it does apply, but it isn't immediately reflected in the editor when switching styles; you have to navigate away from it to see it there. It is applied in the front end correctly. I will file a Gutenberg bug with this issue, but it shouldn't keep the theme from being shipped.

UenoDuo.mp4

[beafialho]

Cool, thanks a lot!

[mikachan]

I found that it does apply, but it isn't immediately reflected in the editor when switching styles; you have to navigate away from it to see it there.

I think this may be covered by this issue: WordPress/gutenberg#46397

[vcanales]

LTGM.

[iamtakashi]

This has been available in WP.org.