Add additional comments and add ProjectOverview to readthedocs

Author: paulnoirel

docs/labelbox/project-overview.rst

@@ -0,0 +1,6 @@
+ProjectOverview
+===============================================================================================
+
+.. automodule:: labelbox.schema.project-overview
+   :members:
+   :show-inheritance:

libs/labelbox/src/labelbox/schema/project_overview.py

@@ -1,14 +1,35 @@
 from typing import Dict, Optional
 from labelbox import pydantic_compat
 
+from typing import Dict
+import pydantic_compat
+
 class ProjectOverview(pydantic_compat.BaseModel):
     """
-    Class that represents a project overview as displayed in the UI
+    Class that represents a project summary as displayed in the UI, in Annotate, 
+    under the "Overview" tab of a particular project.
+
     All attributes represent the number of data rows in the corresponding state.
     The `in_review` attribute is a dictionary where the keys are the queue names
-      and the values are the number of data rows in that queue.
+    and the values are the number of data rows in that queue.
+
+    Attributes:
+        Representing existing fields from the Overview tag (UI names in parentheses):
+
+        to_label (int): The number of data rows that are yet to be labeled (To Label).
+        in_review (Dict[str, int]): A dictionary where the keys are the queue names .
+            and the values are the number of data rows in that queue. (In Review)
+        in_rework (int): The number of data rows that are in the Rework queue (In Rework).
+        skipped (int): The number of data rows that have been skipped (Skipped).
+        done (int): The number of data rows that have been marked as Done (Done).
+        issues (int): The number of data rows with associated issues (Issues).
+        
+        Additional values:
+
+        labeled (int): The number of data rows that have been labeled.
+        all_in_data_rows (int): The total number of data rows in the project.
     """
-    to_label: int
+    to_label: int   
     in_review: Dict[str, int]
     in_rework: int
     skipped: int