add wii mixer and logging cleanup

[carstene1ns]

tested on wii, linux untested on windows, macos, android, emscripten, 3ds, psvita, switch

Some notes:

• Wii plays music now directly with DSP, no abstraction over SDL.
• Color log messages are always enabled now, rang did check for a valid terminal (isatty), but I figured nobody redirects player output to file, when there is a logfile. fmt has no support for old terminals on windows, if this is a problem, we can disable colors for these later
• Android logs are cleaner now in release builds
• 3DS should be able to log over network now (untested, copied from switch)

[Ghabry]

fmt has no support for old terminals on windows

Well the release build on Windows has no "console subsystem" so you will not see them anyway when you are not programming. xD