feat: support xlsm files (#1520)

* code for xlsm support

* updated support for xlsm

* updated code for xlsm support

* Update docling_parse_v4_backend.py

Signed-off-by: ShiroYasha18 <85089952+ShiroYasha18@users.noreply.github.com>

* Update docling_parse_v4_backend.py

Signed-off-by: ShiroYasha18 <85089952+ShiroYasha18@users.noreply.github.com>

* Update test_backend_msexcel_xlsm.py

 updated the tests/test_backend_msexcel_xlsm.py:

 have a function starting with test
removed all print statements
** To add an explicit assert {test}=={pred}

Signed-off-by: ShiroYasha18 <85089952+ShiroYasha18@users.noreply.github.com>

* Update base_models.py

Signed-off-by: ShiroYasha18 <85089952+ShiroYasha18@users.noreply.github.com>

* Update test_backend_msexcel.py

Signed-off-by: ShiroYasha18 <85089952+ShiroYasha18@users.noreply.github.com>

* Update test_backend_msexcel_xlsm.py

Signed-off-by: ShiroYasha18 <85089952+ShiroYasha18@users.noreply.github.com>

* Update document_converter.py

Signed-off-by: ShiroYasha18 <85089952+ShiroYasha18@users.noreply.github.com>

* Delete tests/test_backend_msexcel_xlsm.py

Signed-off-by: ShiroYasha18 <85089952+ShiroYasha18@users.noreply.github.com>

* xlsm file

Signed-off-by: ShiroYasha18 <85089952+ShiroYasha18@users.noreply.github.com>

* run tests

* ran tests

* Fix tests, upgrade XSLM example to a valid file

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

---------

Signed-off-by: ShiroYasha18 <85089952+ShiroYasha18@users.noreply.github.com>
Signed-off-by: Christoph Auer <cau@zurich.ibm.com>
Co-authored-by: Christoph Auer <cau@zurich.ibm.com>

tests/data/groundtruth/docling_v2/2305.03393v1-pg9.json

@@ -336,8 +336,8 @@
         {
           "page_no": 1,
           "bbox": {
-            "l": 139.6674041748047,
-            "t": 454.4546203613281,
+            "l": 139.66741943359375,
+            "t": 454.45458984375,
             "r": 475.00927734375,
             "b": 322.5054626464844,
             "coord_origin": "BOTTOMLEFT"