Feature/routine for decomissioning of exisiting capacity

[FelixMau]

Adding in Decommissioning for stock processes fading out.

• [x] Detect processes (via "0" name end)
• [x] Check on existing max values
• [x] Unify capacity values to one largest capacity occouring

[FelixMau]

Separating caluclaitons to happen pre and post calculation.

Recalculation of activity bonds to be relative values. And then applying decommission logic helps to be certain about already existing max values.

[FelixMau]

Made following changes:

• Rearranged Functions for better overview & understanding
• Implemented pre mapping calculations (to normalize activity bonds and map fix to min and max)
• Revisited Decomissioning function and adapting to now known input if max value was already existing

[FelixMau]

Will be adapting tests on dev to keep things at least a little separated. Going to add empty dictionaries for input and output parameters

[FelixMau]

Now including a nan value handler to replace nan values automatically if the parameter values differ over the periods.

Replacing max values by 9999999999999. Replacing min and all other values by 0.

This feature is not meant to be used extensively since leaving values empty for some years is implicit and in most cases considered 0!

[FelixMau]

Due to unrelated changes returning to #78 d9e872d9e6d4ae483e0c21beac0f27b28ab510d1

Continueing to work on handling nans on #89