Cosmic Text (Continuation of #179)

[LPGhatguy]

Closes #95.

This PR picks up where #179 left off! I didn't do a great job of reviewing this code when @msparkles was working on it, but now I'm hoping to push this work over the finish line.

I created a new branch and PR because I don't have write access to the original repo from #179.

I changed most of the widget APIs to align them when the main branch to make it easier for folks to migrate, including our game. In tandem, I'm working on upgrading our game to support the changes in this PR and using it as a layout test because it's such a big overhaul!

Remaining Issues

• Split premultiplied texture format into separate change
• Split PaintLimits into separate change
• Investigate sizing issues when using expanded alongside this widget
• Audit text alignment inside buttons
• Drag operations that happen outside the textbox bounds always snap to the beginning of the box instead of the nearest position within the box

[LPGhatguy]

Button alignment is currently a little whack. These buttons have a minimum size enforced on them which causes the text to no longer be centered it seems:

[LPGhatguy]

fontdue	COSMIC text

[kanerogers]

ルシアン様、

この度はご連絡いただき、誠にありがとうございます。大変申し訳ございませんが、現在日本に滞在しており、時差の関係でGitHubの課題に取り組むことができません。この不手際に深くお詫び申し上げます。何卒ご理解賜りますよう、お願い申し上げます。

誠心誠意、迅速に対応させていただく所存でございますので、帰国次第、優先的に課題の解決に努めさせていただきます。このたびはご迷惑をおかけしてしまい、心よりお詫び申し上げます。

敬具

ケイン

[msparkles]

(jokingly, directed at kane) we worked on yakui while we were in Taiwan, checkmate liberal