[AV-113] FifoBuffer Class Implementation

[NPIPHI]

Fifo buffer merge, before we use it for flight software we're going to do extensive testing

[AyberkY]

[AV-113] Write a C++ class that encapsulates an implementation of a thread-safe FIFO buffer

[AyberkY]

Alright, turns out the FifoBuffer is mostly in master anyway. Just gunna go ahead and merge this.

We need to grind on testing it ASAP