Added embodied carbon to batteries

[DanteNiewenhuis]

Summary

Added support for embodied carbon of batteries to OpenDC.

To use the embodied carbon of batteries, user have to provided two extra variables to the definition of the battery:

• "embodiedCarbon" defines the total carbon needed to create the battery in kg
• "expecctedLifeTime" defines the expected time the battery will be used in years

OpenDC calculates two things:
First, OpenDC determines the embodied carbon cost per milliseconds.
Next, using the cost per ms, OpenDC can determine the embodied carbon per sample.

Implementation Notes ⚒️

N / A

External Dependencies 🍀

N / A

Breaking API Changes ⚠️

N / A

Simply specify none (N/A) if not applicable.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 0.00%. Comparing base (2a0f78c) to head (3e5379a).
Report is 1 commits behind head on master.

Additional details and impacted files

@@      Coverage Diff      @@
##   master   #303   +/-   ##
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