CMake

docs: api/grn_encoding: Move the default encoding get and set referen… #32

Job	Run time
macOS	29m 21s
Linux (gcc, g++)	42m 18s
Linux (gcc, g++, OFF)	10m 41s
Windows MinGW (MINGW64, mingw-w64-x86_64)	22m 3s
Linux (clang, clang++)	12m 3s
Windows MSVC (windows-2022, 143, 2022)	29m 46s
Windows MinGW (UCRT64, mingw-w64-ucrt-x86_64)	20m 48s
Windows MSVC (windows-2019, 142, 2019)	29m 42s
	3h 16m 42s

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