[Feature Request] Better --module resolution for all generated types

[delasteve]

Bug Report or Feature Request (mark with an x)

- [x] feature request

Prerequisite

Given a project

ng new test-proj
ng g m foo
ng g m foo/bar

Current functionality.

When a user wants to pair a type with a module, the user has to specify the full path to the module, like so:

ng g s baz --module=foo/foo.module

or

ng g s baz --module=foo/foo.module.ts

Desired functionality.

A user should also be able to enter the following command

ng g s baz --module=foo

Mention any other details that might be useful.

Currently, the CLI will error when it can't find the module with

Module specified does not exist

When given

ng g s baz --module=foo

the CLI should preform the following module resolution

src/app/foo.module.ts
src/app/foo/foo.module.ts
Error: Module specified does not exist

This should not be exclusive to top level directories. This scenario should work as well.

When given

ng g s baz --module=foo/bar

the CLI should preform the following module resolution

src/app/foo/bar.module.ts
src/app/foo/bar/bar.module.ts
Error: Module specified does not exist