Feature: WCH RISC-V support #2857

Job	Run time
build-macos (macos-13)	40s
build-linux (jammy, 96b_carbon)	40s
build-macos (macos-14)	23s
build-mingw (windows-2022, mingw64)	1m 35s
build-linux (jammy, blackpill-f401cc)	34s
build-macos (macos-latest)	22s
build-macos (macos-13, gcc@11)	1m 15s
build-mingw (windows-2022, ucrt64)	1m 41s
build-linux (jammy, blackpill-f401ce)	34s
build-macos (macos-13, gcc@12)	1m 12s
build-mingw (windows-2022, clang64)	1m 40s
build-linux (jammy, blackpill-f411ce)	36s
build-macos (macos-13, gcc@13)	1m 38s
build-msvc (meson, windows-2022)	1m 23s
build-linux (jammy, bluepill)	31s
build-macos (macos-13, gcc@14)	1m 6s
build-linux (jammy, ctxlink)	33s
build-macos (macos-14, gcc@11)	59s
size-diff	1m 0s
build-linux (jammy, f072)	46s
build-macos (macos-14, gcc@12)	51s
build-linux (jammy, f3)	39s
build-macos (macos-14, gcc@13)	41s
build-linux (jammy, f4discovery)	33s
build-linux (jammy, hydrabus)	33s
build-macos (macos-14, gcc@14)	56s
build-linux (jammy, launchpad-icdi)	42s
build-linux (jammy, native)	31s
build-linux (jammy, native-uncommon)	28s
build-linux (jammy, native-st-clones)	46s
build-linux (jammy, native-riscv)	30s
build-linux (jammy, native-remote)	36s
build-linux (jammy, stlink)	48s
build-linux (jammy, stlinkv3)	35s
build-linux (jammy, swlink)	35s
	28m 52s

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