feat: Python 3.13 support (#841)

* test: update results with new docling-core

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

* update all deps in the lock

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

* fix table in test results

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

* fix version for python3.13

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

* latest poetry version in CI

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

* activate py3.13 in CI

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

* update docs about python 3.13

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

* test with rapidocr only on python <3.13

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

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