Add create_bullet_list operation to batch_update_doc

Exposes native Google Docs createParagraphBullets and
deleteParagraphBullets APIs via the batch operation manager.
Supports UNORDERED (bullets), ORDERED (numbered), and NONE
(remove formatting) list types with optional nesting levels.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

gdocs/docs_helpers.py

@@ -647,6 +647,33 @@ def create_bullet_list_request(
     return requests
 
 
+def create_delete_bullet_list_request(
+    start_index: int,
+    end_index: int,
+    doc_tab_id: Optional[str] = None,
+) -> Dict[str, Any]:
+    """
+    Create a deleteParagraphBullets request to remove bullet/list formatting.
+
+    Args:
+        start_index: Start of the paragraph range
+        end_index: End of the paragraph range
+        doc_tab_id: Optional ID of the tab to target
+
+    Returns:
+        Dictionary representing the deleteParagraphBullets request
+    """
+    range_obj = {"startIndex": start_index, "endIndex": end_index}
+    if doc_tab_id:
+        range_obj["tabId"] = doc_tab_id
+
+    return {
+        "deleteParagraphBullets": {
+            "range": range_obj,
+        }
+    }
+
+
 def validate_operation(operation: Dict[str, Any]) -> tuple[bool, str]:
     """
     Validate a batch operation dictionary.
@@ -671,6 +698,7 @@ def validate_operation(operation: Dict[str, Any]) -> tuple[bool, str]:
         "insert_table": ["index", "rows", "columns"],
         "insert_page_break": ["index"],
         "find_replace": ["find_text", "replace_text"],
+        "create_bullet_list": ["start_index", "end_index"],
         "insert_doc_tab": ["title", "index"],
         "delete_doc_tab": ["tab_id"],
         "update_doc_tab": ["tab_id", "title"],