feat: added dao code generation and streamlined class code generation

[igorssilva]

Closes #33

Add:

• Support for generation of code for dao classes and interfaces;
• Support for Generalization code generation;
• New default templates.

Mod

• Separated code generation for different packages in different processors and add overriding behavior;
• Removed setting interface ball to interfaces while a fix is not found.

Fix:

• Fixed some java docs