Infer length, precision and scale from database

[cody-scott]

Feature Description

When replicating from a Database to a Database, attempt to infer the length precision and scale for relevant data types such as VARCHAR and NUMERIC/DECIMAL.

Current behaviour seems to case all varchar/nvarchar objects to NVARCHAR(MAX) on MSSQL based runs.
https://docs.slingdata.io/sling-cli/run/configuration seems to indicate support for defining length, so extending this to pull automatically would be beneficial.