Create database models for IEA data

[V3lop5]

Feature request
The application should be able to handle IEA data.

The following datasets should be translated into models:

• world energy valances
• world energy statistics
• indicators
• NASA GISS
• electricity information
  • Capacities
  • ...

Describe the solution you'd like
The following tables are needed:

Table name	Description	Columns
Regions	Identifier for every country/region.	ID, name, optional parent region
EnergySources	Identifies possible sources of energy.	ID, name, optional description
EnergyStorages	Identifies possible storages of energy.	ID, name, optional description
EnergySinks	Identifies possible sinks/consumption of energy.	ID, name, optional description
EnergyConversions	Identifies possible conversion of energy.	ID, name, optional description
Capacities	TS Maximum installed capacities for each region/source/year.	Ref_Region, Ref_Source, Year, Quantitiy
Generations	TS Generated energy for each region/source/year.	Ref_Region, Ref_Source, Year, Quantitiy
Consumptions	TS Consumed energy for each region/source/sink/year.	Ref_Region, Ref_Source, Ref_Sink, Year, Quantitiy

Additional context
TODO: Provide example IEA data.