DOCSP-44431 - Add null type (#29)

Co-authored-by: Jordan Smith <[email protected]>

Author: mongoKart

source/data-types.txt

@@ -35,29 +35,47 @@ Support for additional types will be added in subsequent releases.
    * - BSON Type
      - Type Identifiers
    * - String
-     - ``py.str``, an instance of ``pyarrow.string``
+     - - ``py.str``
+       - Instance of ``pyarrow.string``
    * - Embedded document
-     - ``py.dict``, and instance of ``pyarrow.struct``
+     - - ``py.dict``
+       - Instance of ``pyarrow.struct``
    * - Embedded array
-     - An instance of ``pyarrow.list_``
+     - - Instance of ``pyarrow.list_``
    * - ObjectId
-     - ``py.bytes``, ``bson.ObjectId``, an instance of ``pymongoarrow.types.ObjectIdType``, an instance of ``pymongoarrow.pandas_types.PandasObjectId``
+     - - ``py.bytes``
+       - ``bson.ObjectId``
+       - Instance of ``pymongoarrow.types.ObjectIdType``
+       - Instance of ``pymongoarrow.pandas_types.PandasObjectId``
    * - Decimal128
-     - ``bson.Decimal128``, an instance of ``pymongoarrow.types.Decimal128Type``, an instance of ``pymongoarrow.pandas_types.PandasDecimal128``
+     - - ``bson.Decimal128``
+       - Instance of ``pymongoarrow.types.Decimal128Type``
+       - Instance of ``pymongoarrow.pandas_types.PandasDecimal128``
    * - Boolean
-     - An instance of ``~pyarrow.bool_``, ``~py.bool``
+     - - ``~py.bool``
+       - Instance of ``~pyarrow.bool_``
    * - 64-bit binary floating point
-     - ``py.float``, an instance of ``pyarrow.float64``
+     - - ``py.float``
+       - Instance of ``pyarrow.float64``
    * - 32-bit integer
-     - An instance of ``pyarrow.int32``
+     - - Instance of ``pyarrow.int32``
    * - 64-bit integer
-     - ``~py.int``, ``bson.int64.Int64``, an instance of ``pyarrow.int64``
+     - - ``~py.int``
+       - ``bson.int64.Int64``
+       - Instance of ``pyarrow.int64``
    * - UTC datetime
-     - An instance of ``~pyarrow.timestamp`` with ``ms`` resolution, ``py.datetime.datetime``
+     - - ``py.datetime.datetime``
+       - Instance of ``~pyarrow.timestamp`` with ``ms`` resolution
    * - Binary data
-     - ``bson.Binary``, an instance of ``pymongoarrow.types.BinaryType``, an instance of ``pymongoarrow.pandas_types.PandasBinary``.
+     - - ``bson.Binary``
+       - Instance of ``pymongoarrow.types.BinaryType``
+       - Instance of ``pymongoarrow.pandas_types.PandasBinary``
    * - JavaScript code
-     - ``bson.Code``, an instance of ``pymongoarrow.types.CodeType``, an instance of ``pymongoarrow.pandas_types.PandasCode``
+     - - ``bson.Code``
+       - Instance of ``pymongoarrow.types.CodeType``
+       - Instance of ``pymongoarrow.pandas_types.PandasCode``
+   * - null
+     - - Instance of ``pyarrow.null``
 
 .. note::