experiment: update raw mode handling in basic input backend #1013

Job	Run time
Benchmarks	9m 23s
Build (x86_64/linux)	1m 52s
Build (aarch64/macos)	1m 35s
Build (aarch64/linux)	2m 26s
Build (wasm32/wasi-0.2)	1m 25s
Build (x86_64/windows)	2m 15s
Source code checks (stable)	34s
Check for unneeded dependencies	1m 0s
Source code checks (1.75.0)	28s
Test (linux/x86_64)	1m 43s
Test (macOS)	1m 48s
External tests / bash-completion test suite	8m 21s
OS target tests (Arch Linux/latest)	19s
OS target tests (Azure Linux/3.0)	23s
OS target tests (Debian/testing)	24s
OS target tests (Fedora/latest)	30s
OS target tests (NixOS/latest)	1m 17s
OS target tests (openSUSE Tumbleweed/latest)	29s
	36m 12s

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