Add toc changes for db and coll docs (#2863)

Author: rustagir

docs/fundamentals.txt

@@ -15,11 +15,13 @@ Fundamentals
    :titlesonly:
    :maxdepth: 1
 
+   /fundamentals/database-collection
    /fundamentals/read-operations
    /fundamentals/write-operations
 
 Learn how to use the {+odm-long+} to perform the following tasks:
 
+- :ref:`Manage Databases and Collections <laravel-db-coll>`
 - :ref:`Read Operations <laravel-fundamentals-read-ops>`
 - :ref:`Write Operations <laravel-fundamentals-write-ops>`