Unifying&Reviewing opl drivers, devices and OPLs

[Raffaello]

• MIDDriver is using midi::devices namespace

• ADLDriver is using a bare OPL device, must be converted to use midi::devices

• midi::devices requires an OP2Bank, it might not be available. so it must be optional. or create a parallel adl::devices ...
  also must check if those shared_ptr are not nullptrs ....

• ADLDriver is also taking in an ADLFile, while all the other are taking in a MIDI parsed file., but it can be ok in this case. ADL file and driver are very specific and not intended to be a standard like MIDI.

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midi:devices move to devices that embedd the MIDDriver and ADLDriver for now and have a overloadede play method to play from the device, simpler to use.