`@remotion/layout-utils`: New `fitTextOnNLines()` API

[JonnyBurger]

For example, calculate a fontSize so that the text fits on 3 lines, with a given string and a given width.

[JonnyBurger]

/bounty 250

[algora-pbc]

💎 $250 bounty • Remotion

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[JonnyBurger]

No more attempts

This issue has been assigned to @HiteshChoudhary0098 🎉

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