[documentation] adapt "Run a simulation" in basic usage section

[SabineHaas]

In Basic Usage the users should be able to understand how to run a simple simulation and how to adapt the input data (Define your own components and parameters).

possibly include:

• location: options (provide weather data for some locations that we display in this section - for other locations see section ERA5 download) same for year
• country needs to be adapted according to location
• choose your own input / output directory
• population
• display graph of energy system that will be simulated if components are not adapted