Added support for python -m dpctl -l to list platforms

[oleksandr-pavlyk]

It is pretty cumbersome to use DPCTL to enumerate devices typing python -c "import dpctl; dpctl.lsplatform(verbosity=2)".

This change adds support for enumerating devices in all visible platforms to __main__, replacing the above with much easier to type python -m dpctl -f.

(dev_dpctl) opavlyk@opavlyk-mobl:~/repos/dpctl$ python -m dpctl --help
usage: __main__.py [-h] [--includes] [--cmakedir] [--library] [-l] [-e] [-s]

optional arguments:
  -h, --help       show this help message and exit
  --includes       Include flags dpctl headers.
  --cmakedir       CMake module directory, ideal for setting -DDPCTL_ROOT in CMake.
  --library        Linker flags for SyclInterface library.
  -f, --full-list  Enumerate system platforms, using dpctl.lsplatform(verbosity=2)
  -l, --long-list  Enumerate system platforms, using dpctl.lsplatform(verbosity=1)
  -s, --summary    Enumerate system platforms, using dpctl.lsplatform()

• Have you provided a meaningful PR description?
• Have you added a test, reproducer or referred to an issue with a reproducer?
• Have you tested your changes locally for CPU and GPU devices?
• Have you made sure that new changes do not introduce compiler warnings?

[github-actions]

View rendered docs @ https://intelpython.github.io/dpctl/pulls/1014/index.html

[github-actions]

Array API standard conformance tests for dpctl=0.14.1dev0=py310h8c27c75_5 ran successfully.
Passed: 33
Failed: 801
Skipped: 280

[coveralls]

Coverage increased (+0.06%) to 82.34% when pulling 4952963 on dpctl_module_lsplatform into a3f8141 on master.

[github-actions]

Array API standard conformance tests for dpctl=0.14.1dev0=py310h8c27c75_6 ran successfully.
Passed: 33
Failed: 801
Skipped: 280

[oleksandr-pavlyk]

I have force pushed to change short options used. It is now -f or --full-list, -l or --long-list, and -s or --summary.

[github-actions]

Array API standard conformance tests for dpctl=0.14.1dev0=py310h8c27c75_13 ran successfully.
Passed: 33
Failed: 801
Skipped: 280

[github-actions]

Deleted rendered PR docs from intelpython.github.com/dpctl, latest should be updated shortly. 🤞

[github-actions]

Array API standard conformance tests for dpctl=0.14.1dev0=py310h8c27c75_13 ran successfully.
Passed: 33
Failed: 801
Skipped: 280