Add initialize function for EPS sensors

[danielschloms]

Description

This PR adds functionality to initialize the EPS ADCs for the COBC, including the necessary pin definitions.

Fixes #212

[danielschloms]

There are still 2 unresolved issues:

• This cannot be tested until the COBC is available again.
• The FRAM shares the same SPI, but uses a higher baudrate. This does not seem to be okay, as RODOS does not change the baudrate before transferring data, and the max. baudrate in the datasheet is 10 MHz (FRAM uses 12 MHz).

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.15%. Comparing base (2759332) to head (68fe8ca).
Report is 11 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #252   +/-   ##
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  Coverage   87.15%   87.15%           
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  Files          18       18           
  Lines         514      514           
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  Hits          448      448           
  Misses         66       66           

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