docs/add docstrings to synchronous API (zarr-developers#2549)

* add docstrings and complete function signatures to synchronous api, and tests for the above

* clean up types and docstrings

* Update src/zarr/api/synchronous.py

Co-authored-by: Joe Hamman <[email protected]>

* Update src/zarr/api/synchronous.py

Co-authored-by: Joe Hamman <[email protected]>

* Update src/zarr/api/synchronous.py

Co-authored-by: Joe Hamman <[email protected]>

* Update src/zarr/api/synchronous.py

Co-authored-by: Joe Hamman <[email protected]>

* Update src/zarr/api/synchronous.py

Co-authored-by: Joe Hamman <[email protected]>

* Update src/zarr/api/synchronous.py

Co-authored-by: Joe Hamman <[email protected]>

* Update src/zarr/api/synchronous.py

Co-authored-by: Joe Hamman <[email protected]>

* remove doomed docstring tests

* allow bool in create

---------

Co-authored-by: Joe Hamman <[email protected]>

Author: d-v-b

src/zarr/api/asynchronous.py

@@ -774,9 +774,9 @@ async def open_group(
 
 
 async def create(
-    shape: ChunkCoords,
+    shape: ChunkCoords | int,
     *,  # Note: this is a change from v2
-    chunks: ChunkCoords | None = None,  # TODO: v2 allowed chunks=True
+    chunks: ChunkCoords | int | None = None,  # TODO: v2 allowed chunks=True
     dtype: npt.DTypeLike | None = None,
     compressor: dict[str, JSON] | None = None,  # TODO: default and type change
     fill_value: Any | None = 0,  # TODO: need type
@@ -798,7 +798,7 @@ async def create(
     meta_array: Any | None = None,  # TODO: need type
     attributes: dict[str, JSON] | None = None,
     # v3 only
-    chunk_shape: ChunkCoords | None = None,
+    chunk_shape: ChunkCoords | int | None = None,
     chunk_key_encoding: (
         ChunkKeyEncoding
         | tuple[Literal["default"], Literal[".", "/"]]
@@ -1104,6 +1104,8 @@ async def open_array(
     ----------
     store : Store or str
         Store or path to directory in file system or name of zip file.
+    zarr_version : {2, 3, None}, optional
+        The zarr format to use when saving. Deprecated in favor of zarr_format.
     zarr_format : {2, 3, None}, optional
         The zarr format to use when saving.
     path : str, optional