Upgrade all crates to the 2024 edition and bump MSRV to 1.85 #385

Job	Run time
build (stable, wasm32-unknown-unknown)	40s
build (stable, thumbv7em-none-eabi)	38s
build (1.85.0, thumbv7em-none-eabi)	41s
build (1.85.0, wasm32-unknown-unknown)	39s
doc	49s
test (i686-unknown-linux-gnu, 1.85.0, sudo apt update && sudo apt install gcc-multilib)	1m 40s
test (i686-unknown-linux-gnu, stable, sudo apt update && sudo apt install gcc-multilib)	1m 36s
test (x86_64-unknown-linux-gnu, 1.85.0)	1m 21s
test (x86_64-unknown-linux-gnu, stable)	1m 13s
cross (aarch64-unknown-linux-gnu, 1.85.0)	1m 20s
cross (powerpc-unknown-linux-gnu, 1.85.0)	1m 29s
cross (armv7-unknown-linux-gnueabihf, stable)	1m 46s
cross (aarch64-unknown-linux-gnu, stable)	1m 13s
cross (armv7-unknown-linux-gnueabihf, 1.85.0)	1m 51s
cross (powerpc-unknown-linux-gnu, stable)	1m 35s
	18m 31s

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