Add compile_commands.json CMake script, and Lapce runners (#302) #1270

Job	Run time
macos-Debug	2m 21s
linux-Debug	7m 54s
macos-RelWithDebInfo	2m 36s
msys2-mingw64 (Debug, false)	7m 43s
linux-RelWithDebInfo	9m 1s
msys2-mingw64 (RelWithDebInfo, false)	7m 50s
linux-MinSizeRel	8m 22s
msys2-mingw64 (MinSizeRel, false)	6m 13s
msys2-mingw64 (RelWithDebInfo, true)	7m 7s
	59m 7s

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