Upgrade all crates to the 2024 edition and bump MSRV to 1.85 #755

Job	Run time
build (1.85.0, armv7a-none-eabi)	17s
cross (aarch64-unknown-linux-gnu, 1.85.0)	43s
build (1.85.0, thumbv7em-none-eabi)	13s
cross (aarch64-unknown-linux-gnu, stable)	46s
build (1.85.0, wasm32-unknown-unknown)	17s
cross (powerpc-unknown-linux-gnu, 1.85.0)	37s
build (stable, armv7a-none-eabi)	13s
cross (powerpc-unknown-linux-gnu, stable)	46s
build (stable, thumbv7em-none-eabi)	13s
build (stable, wasm32-unknown-unknown)	20s
test (i686-unknown-linux-gnu, ubuntu-latest, 1.85.0, sudo apt update && sudo apt install gcc-mult...	34s
x86 (x86_64-unknown-linux-gnu, 1.85.0)	23s
test (i686-unknown-linux-gnu, ubuntu-latest, stable, sudo apt update && sudo apt install gcc-mult...	25s
x86 (x86_64-unknown-linux-gnu, stable)	19s
test (x86_64-unknown-linux-gnu, ubuntu-latest, 1.85.0)	17s
test (x86_64-unknown-linux-gnu, ubuntu-latest, stable)	21s
test (x86_64-apple-darwin, macos-latest, 1.85.0)	19s
test (x86_64-apple-darwin, macos-latest, stable)	26s
test (x86_64-pc-windows-msvc, windows-latest, 1.85.0)	27s
test (x86_64-pc-windows-msvc, windows-latest, stable)	36s
minimal-versions / minimal-versions	55s
	9m 27s

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