Questionnaire: bump to rc2 & migrate options

Bump Questionnaire version to 1.0.0-rc2 and set language to nl-NL; update title and bilingual publisher/copyright/purpose/description fields. Convert legacy "option" arrays and "initialCoding" defaults to FHIR R4-style "answerOption" entries and add "initialSelected" where appropriate. Reorganize several items/groups (notably linkId 26 and contact person groups), add explicit enableWhen operators and enableBehavior:"any" for conditional items, and adjust readOnly/choice semantics across many entries. Misc: restore/adjust item ordering, add more Dutch text, and ensure consistent choice/enable structures. No dependency lock changes.

Author: ArdonToonstra