Merge pull request 'Add go-no-go variant, dual task, Wechsler and VOSP, plus minor tweaks' (#44) from updates into master

This merges in a set of changes requested at the end of 2025.

Four new assessments are added to the form:

- go-no-go variant (renaming the old heading, but not field IDs); Untertest Go/NoGo – Variante: 2 aus 5
- dual task; Geteilte Aufmerksamkeit – Variante: Doppelaufgabe I
- Wechsler logical memory scale; Wechsler Memory Scale (WMS) – logisches Gedächtnis
- VOSP cube analysis; Testbatterie für visuelle Objekt- und Raumwahrnehmung (VOSP) – Subtest 8: „Würfelanzahl analysieren“

This also introduces minor changes:

- JTT sum is displayed
- EuroQol fields can be enabled separately
- Form data version is increased to to 2.4

Reviewed-on: https://hub.psychoinformatics.de/sfb1451/z03-assessment-center-data-entry/pulls/44

Author: mslw

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