Adjust `fastkit addroute` command

# Request a new feature / feature improvement

## Feature Description

add a feature of `fastkit addroute` command to recognize current working project.

ex) `fastkit addroute . user` -> add `user` routes at current project

## Job Details (Optional)

- [ ] add cmd option logic
- [ ] add testcase options (ask user to create testcases when attaching new route)
