Improvement/library submodule

[crsz20]

Summary

Created a new repo to link our custom libraries as a git submodule. Changes are centralized and repos using the new repo can share their updates.

Unit tests will be moved to the new repo. So now, DataAcquisition2.0 only performs project builds.

Remarks

To clone from scratch:
git clone --recurse-submodules -b improvement/library-submodule https://github.com/DallasFormulaRacing/DataAcquisition2.0

To try this out if you already have the repo cloned:

git fetch
git switch improvement/library-submodule
git submodule update --init

You should see the git submodule in the following path: `Project/DAQ_System/Program` named as `DFR_Libraries/`.