Naming of attributes of Agents

## Is your feature request related to a problem? Please describe
I find the naming of two attributes/columns in the agent.csv file— **"Name"** and **"AgentShare"**— are not intuitive, (perhaps other users might feel the same??)

According to the documentation ((https://muse-os.readthedocs.io/en/latest/inputs/agents.html), the definitions of these two attributes are:
"Name": Refers to the name **shared** by a retrofit and new-capacity agent pair.
"AgentShare": Refers to the share of the existing capacity assigned to this agent.

To me, a "Name" column normally is some kind of identifier of an agent, but here in MUSE,the value in the "Name" attribute/column is something (name) that agents **share**.

## Describe the solution you'd like

I don't have a solution, but I am thinking the **"Name"** attribute may be called something like "SharedName"??
And my understanding of the "AgentShare" attribut is it's some kind of ID of an agent, so maybe something like "agentID"???
(In addition, if "retrofit-new" pair will no longer be used in future version of MUSE, maybe the "Name" column can be even dropped?)

Beginne damit, das Schema von agent.csv und die in der Issue verlinkte Dokumentation zu den Agents-Eingaben zu prüfen, und verfolge dann, wo Name und AgentShare verwendet werden. Bestimme die beabsichtigte Semantik und die Auswirkungen jeder Umbenennung; abgeschlossen ist die Aufgabe, wenn die Namensentscheidung und die betroffene Dokumentation oder die betroffenen Eingaben vereinbart und aktualisiert sind.

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