Add support for table prefix

[xiaotupansy]

Table in database:
t_User

Generated class now:
public class tUser

Expected output:
public class User

[RupertAvery]

I have made a pull request for this feature:

#339

A pattern will be used to extract the entity name and optionally apply a prefix or suffix. For example, if the table name is "tblEmployees", the pattern ^tbl(?<ClassName>.*?)$ will extract "Employees"

The extracted name can be prefixed or suffixed further.

To match all tables and apply a prefix, one might use the pattern ^.*?$.

example configuration in generation.yml under data > entity

    entityNamingFilters:
      - pattern: ^tbl(?<ClassName>.*?)$
        prefix: 
        suffix: 
      - pattern: ^vw(?<ClassName>.*?)$
        prefix: 
        suffix: View

In your case the configuration would be

    entityNamingFilters:
      - pattern: ^t_(?<ClassName>.*?)$