Add `ReadOnlySpan<T>` / `ReadOnlyMemory<T>` overloads #307

Job	Run time
CI (ubuntu-22.04, mcr.microsoft.com/dotnet/sdk:8.0-bookworm-slim, ./build.sh)	57s
CI (ubuntu-22.04, rockylinux:8, ./build.sh)	1m 29s
CI (ubuntu-22.04, mcr.microsoft.com/dotnet/sdk:8.0-alpine3.18, ./build.sh)	1m 4s
CI (macos-12, ./build.sh)	1m 40s
CI (windows-2022, .\build.ps1)	1m 44s
	6m 54s

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