DOCSP-39895: Bulk write guide (#117)

Author: norareidy

source/fundamentals/crud/write-operations.txt

@@ -10,6 +10,7 @@ Write Operations
    /fundamentals/crud/write-operations/insert
    /fundamentals/crud/write-operations/change
    /fundamentals/crud/write-operations/delete
+   /fundamentals/crud/write-operations/bulk
 
 ..
    /fundamentals/crud/write-operations/arrays
@@ -18,6 +19,7 @@ Write Operations
 - :ref:`rust-insert-guide`
 - :ref:`rust-change-guide`
 - :ref:`rust-delete-guide`
+- :ref:`rust-bulk-guide`
 
 .. - :ref:`rust-arrays-guide`
 .. - :ref:`rust-upsert-guide`