Rename Arbeitslosengeld 2 to Bürgergeld after 2022

[MImmesberger]

What problem do you want to solve?

Adds a Bürgergeld namespace and makes all ALG 2 functions inactive after 2022.

Also, I moved all functions that were in the arbeitslosengeld_2/aggregations.py to familie/familie.py. Hence, anzahl_kinder_bg, anzahl_personen_bg, ... are now in the familie namespace. I also moved anzahl_personen_sn from Einkommensteuer to familie and anzahl_personen_eg as well. This makes sense because

• Putting them in the ALG2 / Einkommensteuer / Grundsicherung namespace made sense when we planned to have the IDs in the corresponding namespace. We decided against this but didn't move those derived variables.
• They are different groupings of family members, it is a bit confusing to use einkommensteuer__anzahl_personen_sn in other namespaces just because of the _sn when we don't do so for, say, kinderzuschlag__bruttoeinkommen_m_bg. Seems inconsistent to me.

[codecov]

Codecov Report

❌ Patch coverage is 63.33333% with 132 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/gettsim/germany/bürgergeld/regelbedarf.py	58.24%	38 Missing ⚠️
src/gettsim/germany/familie/familie.py	62.96%	20 Missing ⚠️
src/gettsim/germany/kinderzuschlag/einkommen.py	48.38%	16 Missing ⚠️
src/gettsim/germany/bürgergeld/einkommen.py	70.00%	9 Missing ⚠️
src/gettsim/germany/bürgergeld/bürgergeld.py	42.85%	8 Missing ⚠️
...c/gettsim/germany/bürgergeld/kindergeldübertrag.py	73.07%	7 Missing ⚠️
...gettsim/germany/einkommensteuer/abzüge/vorsorge.py	0.00%	6 Missing ⚠️
...ettsim/germany/grundsicherung/im_alter/im_alter.py	40.00%	6 Missing ⚠️
...gettsim/germany/bürgergeld/freibeträge_vermögen.py	54.54%	5 Missing ⚠️
...c/gettsim/germany/kinderzuschlag/kinderzuschlag.py	60.00%	4 Missing ⚠️
... and 8 more

📢 Thoughts on this report? Let us know!

[hmgaudecker]

Very nice, many thanks!!!

Don't forget the changelog.