[DMB] Implement RTOS Wrapper for Timer

[cjchanx]

Intro task for DMB work, implement the FreeRTOS C++ wrapper for RTOS timers.

Reportee: @cjchanx

Implementing and testing:
Components/Core/Timer.cpp
Components/Core/Timer.hpp

Desired Output

• Timer object implemented and tested that supports the following:
• Polling timers (it will update in the background, and we only care about if it is active when we poll it (for instance, calling tmr->GetState()) : please make an enum / rudimentary state diagram for the timer if possible.
• Timer.cpp/hpp is properly documented and follows coding standards

Resources
https://www.freertos.org/FreeRTOS-Software-Timer-API-Functions.html

Future Activity - Will be new card once this card is reviewed

• Expand timer into an "interrupt timer" which will automatically call a passed in callback.

Linked Trello Card