Package Cobalt for Linux

[dahlstrom-g]

Issue: 365150653

[kaidokert]

Please factor in the feedback.

Also wrap the execution into a function, invoked by block

if __name__ == "__main__":
   ...

See Python style guide as to why: https://google.github.io/styleguide/pyguide.html#317-main

We generally follow Google Python style guide, with Chromium one taking precedence where applicable https://chromium.googlesource.com/chromium/src/+/main/styleguide/python/python.md

[dahlstrom-g]

https://google.github.io/styleguide/pyguide.html#317-main

I do agree with following a style guide; I'll keep that in mind.
Pragmatically though have we had problems with people
trying to import our similar Python scripts as modules?

[kaidokert]

lgtm now for a first pass, to get things moving