feat(docx): Process drawingml objects in docx (#2453)

* Export of DrawingML figures into docling document

* Adding libreoffice env var and libreoffice to checks image

Signed-off-by: Rafael Teixeira de Lima <Rafael.td.lima@gmail.com>

* DCO Remediation Commit for Rafael Teixeira de Lima <Rafael.td.lima@gmail.com>

I, Rafael Teixeira de Lima <Rafael.td.lima@gmail.com>, hereby add my Signed-off-by to this commit: 9518fffcad1673cae81134914f35324acb2d4f40

Signed-off-by: Rafael Teixeira de Lima <Rafael.td.lima@gmail.com>

* Enforcing apt get update

Signed-off-by: Rafael Teixeira de Lima <Rafael.td.lima@gmail.com>

* Only display drawingml warning once per document

Signed-off-by: Rafael Teixeira de Lima <Rafael.td.lima@gmail.com>

* add util to test libreoffice and exclude files from test when not found

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* check libreoffice only once

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* Only initialise converter if needed

Signed-off-by: Rafael Teixeira de Lima <Rafael.td.lima@gmail.com>

---------

Signed-off-by: Rafael Teixeira de Lima <Rafael.td.lima@gmail.com>
Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>
Co-authored-by: Michele Dolfi <dol@zurich.ibm.com>