fix: Handling of single-cell tables in DOCX backend (#314)

* Handling of single-cell tables in DOCX backend

Signed-off-by: Maksym Lysak <mly@zurich.ibm.com>

* returned try-catch on tables handling

Signed-off-by: Maksym Lysak <mly@zurich.ibm.com>

* cleaned

Signed-off-by: Maksym Lysak <mly@zurich.ibm.com>

* proceed processing the content of single cell table as if its just part of the body

Signed-off-by: Maksym Lysak <mly@zurich.ibm.com>

* Added example of trickly 1 cell table docx

Signed-off-by: Maksym Lysak <mly@zurich.ibm.com>

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Signed-off-by: Maksym Lysak <mly@zurich.ibm.com>
Co-authored-by: Maksym Lysak <mly@zurich.ibm.com>