fix(yo,generator): remove prefix 'generator-'

As it's useless.

Signed-off-by: Édouard Lopez <dev+git@edouard-lopez.com>
style(comment): prepend command to variables

Signed-off-by: Édouard Lopez <dev+git@edouard-lopez.com>
feat(blacklist): add a blacklist mechanism

Allow to skip some term/generators

Signed-off-by: Édouard Lopez <dev+git@edouard-lopez.com>