Amat

(So far, it `Could not find module ‘TinyApl.Keymaps’.`, even though I've listed in tinyapl.cabal and I can't figure out why that is)

(The `''` ones are ones I'm as-of-now unsure about, comparing keyboard layouts is tricky)

All that would be left would be to tweak/add the keymap(s), the actual code should be done

I wonder if `RealArrayValue: Copy` is necessary; a rational should probably implement it but in this impl they're on heap

Linear forms of them can be written relatively easily for the times where they're needed: [one way, using do](https://uiua.org/pad?src=0_17_0-dev_1__IyBFeHBlcmltZW50YWwhClRXISDihpAg4oeM4peM4o2iKPCdhJDijJ7iioLCsOKKgnzijaMo4o2pXjDiiqIpMCkg4oqZW10K4oqZ4peM4o2cbm93KFRXITzigoHigoAp4oehM2U2CuKKmeKXjOKNnG5vdyjilr3in5w8MTAp4oehM2U2CuKKmeKXjOKNnG5vdyjihpkvK-KKuDwxMCnih6EzZTYK4oqZ4peM4o2cbm93KOKGmTEwKeKHoTNlNgo=) They probably don't deserve primitives

Are there any issues blocking this PR? (I'd be happy to fix them) I've come across the exact same situation: `draw_text` has its `measure_text` counterpart, but `draw_multiline_text` does not have...