adding rp2350 video synth code

adding Feather RP2350 with HSTX to DVI video synth code. three modes: bar graph animation, bouncing circles, party parrot synthwave. a rotary encoder changes modes. 3 potentiometers control the animations. pdm mic is used for audio fft visualizations. button on rotary encoder toggles the pots on/off. if off, then default values are used for the animations

Author: BlitzCityDIY