Add support for SNES console

[spotlessmind1975]

It would be interesting to port the library to support the target Super Nintendo Entertainment System (SNES) / Super Famicom (スーパーファミコン),. The target will be assigned to the snes shortcut.

Status of the feasibility study for the request:

• C Compiler: tiny C compiler (https://github.com/alekmaul/pvsneslib/tree/master/compiler/tcc-65816)
• Hardware specifications: http://problemkaputt.de/fullsnes.htm http://problemkaputt.de/fullsnes.htm
• Programming examples: