asciidoc writer: Add more table features (#11267)

This adds the following table features:

- row span and column span
- footer row
- individual horizontal cell alignment

[API change] T.P.Writers.Shared: Add functions `allRowsEmpty` and
`tableBodiesToRows` from the RST writer for reuse in other writers.

Also fix hlint warning about `unzip` from `NonEmpty`:
The exported polymorphic function will become
monomorphic in the future. Restrict the `NonEmpty`
import to use the Prelude `unzip` function.

0 files changed, 0 insertions, 0 deletions