Add a visual for linear pots, throttle, and brake

[amoghyatnatti]

This feature is mostly finalized. The main concerns are just fixing the visuals and making sure that the readability is there. Checkout the pedal-display branch to work on it

[amoghyatnatti]

• Add hardcoded colors like Red, Blue, Green, Yellow, Purple, etc.
• Look into making the label more readable (bigger font, better placement, etc.)
• Clear the pedals when the clearAllCharts (in ChartManager) command is called in DataAnalyzer