replace electricityMerger ghpython component in Core

[christophwaibel]

Describe the bug
There are custom ghpython components for merging grid electricity in the main template. They use import Hive.IO.EnergySystems, which will not work anymore once we remove the epw_reader.py component from honeybadger (#692 ). In that python script, we load in dependencies that make this import work. But once we create a proper Hive.IO component for merging electricity, we won't need these dependencies anymore.

clr.AddReferenceToFileAndPath(os.path.join(path, "Libraries\Hive", "Hive.IO.gha"))
import Hive.IO.EnergySystems as ensys

To Reproduce
remove Hive.Core.epw_reader.ghpy from the grasshopper components libraries folder and the main hive template will stop working properly.

Screenshots

Software

• build from Migrate combustion and EPW-reader from Hive.Core to Hive.IO #692

Additional context
related comment from earlier PR

[ChrisZenhub]

To Do:

• modify the grasshopper component \Hive.IO\GhMergers\GhPurchasedElectricity.cs
• instead of having the input parameter elecPurchased, it should read a list of Hive.IO.EnergySystems (i.e., all technologies that require or produce electricity: chiller, ashp, PV, CHP, ...)
• also add a new input for building electricity demand (plug loads) and a boolean for hourly. Have a look at other merger components in the namespace Hive.IO\GhMergers and try to follow their structure, if possible
• the component will need to identify how much electricity needs to be purchased from the grid, i.e., replacing the lines var elecPurchased = new List<double>(); DA.GetDataList(1, elecPurchased); with code contained in the two custom ghpython components as seen on the screenshot.
• the elecDemandOut of the ghpython component in the middle of the screenshot above is what needs to be now internally calculated in GhPurchasedElectricity.cs
• the heatDemandOut of the ghpython component will be redundant and can be ignored
• you can locate those two custom ghpython components in the EaCS3_E04_Hive_Template.gh to the very right, just before the Results group

[ChrisZenhub]

possible relation with #707