add FastAPI-fastkit dependency at templates

[bnbong]

Request a new feature / feature improvement

Feature Description

Adding FastAPI-fastkit dependency at dep files (requirements.txt, pyproject.toml, etc...)

When using uv and when FastAPI project initialized at current workspace by fastkit, fastkit turns to unavailable because fastkit dependency was not in pyproject.toml.

Job Details (Optional)

• Add FastAPI-fastkit dependency at dep files.