cmake echo coloured output

Edit

cmake color colour echo message output print trace warning

string(ASCII 27 Esc)

message("${Green}Hmm...${ColourReset}")
message("${Esc}[32mHmm...${Esc}[m")

add_custom_target(escape
    COMMAND ${CMAKE_COMMAND} -E cmake_echo_color --green "Hmm..."
)