profile CLI tools

Is your feature request related to a problem? Please describe. Right now the way to run scalene is to assume some input .py script to do scale my_prog.py and get profiles. But this doesn't quite work for a scenario where I'm using a CLI tool that happens to mostly be a Java codebase that spawns a python process to do an ML model inference in pytorch/serve

Describe the solution you'd like scalene torchserve --start and get all the profiles I need

Describe alternatives you've considered A colleague has recommended I use https://github.com/benfred/py-spy but I find the experience in scalene to be far superior for my users.

Additional context Github issue describing some of my problems https://github.com/pytorch/serve/issues/1504#issuecomment-1081294549

For whatever reason @profile assumes an --on argument for which I couldn't find documentation for. `scalene.start_profile() doesn't play too well with the existing torchserve codebase and makes our existing metric collector not find its process ID. Logs and reasoning are all in the github issue

The reason I'm so interested in scalene in the first place is that a lot of my users struggle to prepare their models for inference and basically reinvent a profiling and benchmarking suite. I think scalene is great and would be happy to recommend it more in docs or even enable gated behind some environment variable by default.