Add class `forecasting` #1691

[l-emele]

Summary of the discussion

Type of change (CHANGELOG.md)

Add

• Class: forecasting model calculation: A forecasting model calculation is a model calculation that produces a forecast.
• Alternative label: forecasting
• Axiom: 'forecasting model calculation' 'has information output' some forecast

Workflow checklist

Automation

Closes #1691

PR-Assignee

• [ ] 🐙 Follow the Pull Request Workflow
• [ ] 📝 Update the CHANGELOG.md
• [ ] 📙 Add #'s to term tracker item

Reviewer

• [ ] 🐙 Follow the Reviewer Guide
• [ ] 🐙 Provided feedback and show sufficient appreciation for the work done

[stap-m]

FYI: forecast time series are discussed here #1699 Meanwhile, I think the axiom forecasting 'has information output' some forecast is useful. We should also think about a class forecasting model.

[l-emele]

The axiom forecasting 'has information output' some forecast is already there (line 1697).

Given the discussion in #1699 shall I add forecasting model calculation as alternative label to forecasting? (Or even use forecasting model calculation as main label and forecasting as alternative label?)

[l-emele]

Given the discussion in #1699 shall I add forecasting model calculation as alternative label to forecasting? (Or even use forecasting model calculation as main label and forecasting as alternative label?)

@stap-m : You gave a thumbs up here. Which option for the main label do you prefer, forecasting model calculation or forecasting?

[stap-m]

forecasting model calculation as main label.

[l-emele]

forecasting model calculation as main label.

I switched the labels and adapted the definition accordingly. Please review!