Enhance Logger

[elBoberido]

Brief feature description

Enhance the basic logger implementation from #1345

Detailed information

• use distinct methods in LogStream& operator<< instead of the templated method with SFINEA for arithmetic types
  • the template method prevents the implicit conversion of types to an arithmetic type and the function overloading selects LogStream& operator(const bool value) for e.g. IOX_LOG(INFO) << greater_or_equal<uint32_t, 42>(13)
• find a good way for lazy evaluation
  • if statement without braces causes warnings in the static code analyzer
  • variadic macros/templates with some lambda magic might work
• C-Binding?
• extend LogStream/ConsoleLogger for LogBin and LogRaw
• extend LogStream/ConsoleLogger for char
  • currently int8_t and uint8_t are supported which desugar to signed char and unsigned char
  • instead of 'a' only "a" works
• add customization options like
  • switch between system clock, steady clock or just a counter
  • add thread ID from where the logger was called
  • optionally print file, line and function in ConsoleLogger
• use the iox platform for all POSIX calls
  • the initial idea was to place the logger one layer below the platform in order to be able to change the logger via the platform files but this should be done in a different way, e.g. by a -DIOX_LOGGER_PATH cmake argument
• redirect the printing in the platform layer to the logger