missing bits

[DerThorsten]

• layouts:
  • fixed-sized-binary layout
  • binary-view layout / "german-string" layout
  • LARGE_STRING and BINARY_LARGE binary support in variable-sized-binary layout (add LARGE_BINARY and LARGE_STRING #280)
  • any layout with date-time elements
• tests:
  • use all layouts as child (tests if factory is working for all)
  • use visit on detyped-array for all layouts
  • test actual compatibility with rest of arrow (ie nanoarrow?) for each layout
  • consistency test for each layout to check if offsets are handled correct?
• refactorings:
  • remove broken data-type from value-type logic, instead use layout-type itself to get data-type
• fixes:
  • concept to detect layout is broken -- not all layouts have .bitmap and .values (this is already fixed in recursive sparrow builder from nested "ArrayOfStruct" - like structures #276 by just removing those entries from the concept)
• APIS:
  • add APIs to access child arrays as sparrow::array instead of array_wrapper ptrs
  • add API to access offset corrected children for list/string/union layouts
  • zero copy slices (Add slice method to array #287)