New backend is based on littleFS. After init, there is created new file
with continuous numeration. When max size of file is reached, system
creates another one. File size is limited by Kconfig option.
There is possibility to overwrite old files or drop new ones.
FS backend logging to file if the FS location is available.
Otherwise log messages are drooped.
User can also change the name of log files.
Signed-off-by: Mateusz Syc <Mateusz.Syc@nordicsemi.no>
Signed-off-by: Andrzej Puzdrowski <Andrzej.Puzdrowski@nordicsemi.no>
Clean up logging menuconfig by grouping configuration into
sections like: mode, processing configuration, backends.
Additionlly, removed LOG_ENABLE_FANCY_OUTPUT_FORMATTING which is no
longer in use.
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
