refactor: reorder fields in buildDataSection to match NamedListView spec

Reorder the fields array in buildDataSection to follow the logical
grouping from the NamedListView specification:
1. _source (read-only display)
2. _columns (fields/columns selector)
3. _filterBy (filter conditions)
4. _sortBy (sort configuration)
5. prefixField
6. _groupBy (UI extension)
7. _pageSize / _pageSizeOptions (pagination)
8. searchableFields / filterableFields / hiddenFields
9. _quickFilters
10. virtualScroll
11. _typeOptions (type-specific sub-configs)

Updated comments to reference the corresponding NamedListView spec
properties. No functional changes — only reorder and comment updates.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: Copilot