【Feature Request】Add support for types in Oracle

[klawiat]

Currently, there is no support for custom types at all; in DBeaver, you can display custom types via Schema -> Types.
Desired features:

1. Displaying a drop‑down list of types
2. The ability to view DLLs

sql for retrieving data by type:

SELECT 
    types.TYPE_NAME,
    types.ATTR_NAME,
    types.ATTR_TYPE_NAME , 
    types.LENGTH, 
    types.PRECISION,
FROM 
    ALL_TYPE_ATTRS types