feat: allow users give project name

[ydcjeff]

Description: Allow users to give project name which is used as package name as well

[trsvchn]

Thank @ydcjeff! I've tested it locally, and it works fine!

[vfdev-5]

@ydcjeff there can be an issue if user rename the project something like project-abc and imports like below wont work IMO

from project-abc.trainers import create_trainers, TrainEvents
from project-abc.handlers import get_handlers, get_logger
from project-abc.utils import setup_logging, log_metrics, log_basic_info, initialize, resume_from
from project-abc.config import get_default_parser

[ydcjeff]

Yes, that won't work
Users need to give with underscore.