Add schema to namespace

[BartBr]

Support multiple database schemas without a number added to the model name or prefix the schema to the model (example: Person1 & Person2 or SchemaOnePerson & SchemaTwoPerson)

Instead, add the database schema to the namespace. (example: SchemaOne.Person & SchemaTwo.Person)

In the DbContext, the schema name is prefixed in the variable name.

Original feature request: #29

[pwelter34]

This PR is no longer need. Thank you for your contribution.

To use the schema in a namespace, directory or class name use the new {Table.Schema} variable in the configuration file.

Documentation: https://efg.loresoft.com/en/latest/variables/\
Sample: https://github.com/loresoft/EntityFrameworkCore.Generator/tree/master/sample/TrackerSchema/TrackerSchema.Core