Make obfuscated text rendering less memory-intensive

[muzikbike]

Request Description

Minecraft's implementation of this is terrible, and causes the game to cache thousands of characters in hundreds of files in RAM after not too long looking at it. https://bugs.mojang.com/browse/MC-277733

Perhaps for each character width, we could only keep around fifty glyphs in memory, and loop through them randomly, instead of selecting matches from the entirety of whatever Unifont has to offer?