Improve setup documentation

[avikalpg]

Added requirements.txt file and updated the README to include more detailed steps to setup the project locally.

I also added a __main__.py file which is an exact replica of the main.py file because running jobber.main module was not working for me.

[nischalj10]

I used uv to initialise the venv and compile the requirements.txt file from pyproject.toml - I think that would be a better approach rather than maintaining requirements file ourselves.

let me know if you wanna take that up or I will do that and update the readme and requirements.txt. the main.py file is a nice addition, I can merge the PR with just that if you can remove the updates from readme/ requirements.

[bengabp]

I used uv to initialise the venv and compile the requirements.txt file from pyproject.toml - I think that would be a better approach rather than maintaining requirements file ourselves.

let me know if you wanna take that up or I will do that and update the readme and requirements.txt. the main.py file is a nice addition, I can merge the PR with just that if you can remove the updates from readme/ requirements.

Yeah using uv is better