feat: Sequential Circuits

[fabjenny13]

Circuits that can store memory and use previous state information to determine next state.

Can start off by implementing:

1. Clock
2. D Flip flop

Clock will have a start/stop toggle. When user starts the clock , it's going to generate pulses at some frequency rate that can be adjusted.
To visualize the clock pulse, the output pin on the clock can flash red when HIGH and no color when LOW.

flip flop will use this clock and updates at every rising edge of clock pulse.