Implement entire method generation

[dex3r]

So far, only the body code generation has been implemented.
I've added some abstractions and examples to allow for entire method generation (without prior partial declaration).

Implement it.

Take a look at those examples. Don't modify them, just make sure they compile, add automated tests and implement them.

ColorsClassFluentCreated
MapperFluentCreated

For now forget about Method Template. Focus only on entire method generation (not only body).

The solutions needs to compile and tests need to pass after this PR. Examples should not be modified.

[dex3r]

That was not a good direction.