Change the parameter of the storeMessage, add tests for the spare field and small changes in the documentation

Formatting

Remove an unnecessary assertion and assign the currentBit

Minor changes

Added an error condition

Added tests for the spare field

Minor change in the documentation

Reimplement the spare field

# Conflicts:
#   src/Services/EventActionService.cpp

- A potential bug

# Conflicts:
#   CMakeLists.txt

Resolve issue with test failing on GitLab CI

Closes #12

See merge request acubesat/obc/ecss-services!22

Fix a bug in reportParameterIds() caused by the transition to calling-by-reference, namely: not resetting the reading position before attempting reads, resulting in incorrect data being read