new module: cpu_arch

dev_mode: disable msvc warning for unknown attribute

dev_mode: disable missing field initializer warning

add_lib: only add inlines-hidden for C++

dev_mode: use PROJECT_NAME, only set opts for c and c++

add_lib: add_module, set_visibility

msg status in auto option

- icm_auto_option: more possible values

- dev_mode: export compile commands, bump default standards

new lib: option

new library: icm_check_charconv_fp_to_chars

add_lib:

    - use BUILD_SHARED_LIBS
    - add -fvisibility-inlines-hidden
dev_mode: slash to dash in msvc options

[dev_mode]:

    - USE_FOLDERS to ON
    - /Zc:templateScope to MSVC

[dev_mode] more idiomatic settings of compiler and linker flags