feat: adding the label picture_group (#283)

* feat: adding the label picture_group

Signed-off-by: Peter Staar <taa@zurich.ibm.com>

* renamed group to area

Signed-off-by: Peter Staar <taa@zurich.ibm.com>

* reformatted the code

Signed-off-by: Peter Staar <taa@zurich.ibm.com>

* reformatted the docs

Signed-off-by: Peter Staar <taa@zurich.ibm.com>

---------

Signed-off-by: Peter Staar <taa@zurich.ibm.com>

docling_core/types/doc/labels.py

@@ -78,6 +78,7 @@ class GroupLabel(str, Enum):
     KEY_VALUE_AREA = "key_value_area"
     COMMENT_SECTION = "comment_section"
     INLINE = "inline"
+    PICTURE_AREA = "picture_area"
 
     def __str__(self):
         """Get string value."""

docs/DoclingDocument.json

@@ -804,7 +804,8 @@
         "form_area",
         "key_value_area",
         "comment_section",
-        "inline"
+        "inline",
+        "picture_area"
       ],
       "title": "GroupLabel",
       "type": "string"