Implement models required for Form Submissions API

[ekigamba]

The following models will be required by the Form Submissions API

• form s table
• form_metadata

The client_forms table will have the following columns

Column name	Column Type	Nullable	Indexes	Misc
id	int	no	PK, FK of client_form_metadata.id	auto_incremented
json	JSONB	no

The client_form_metadata table will have the following columns:

Column name	Column Type	Nullable	Indexes
id	int	no	PK
identifier	varchar	no	b_tree
jurisdiction	varchar	yes
form_version	varchar	no	b_tree
label	varchar	no
module	varchar	yes