Add --version and auto-update README (enforced)

[asmacdo]

Fixes #48
Fixes #59

[asmacdo]

Marked as draft to include auto readme update #59

[asmacdo]

On last change needed-- run the script in gh actions and assert no diff.

[asmacdo]

The new CI check updates the README.md with the contents of duct --help

the diff

 -optional arguments:
+options:

in python 3.10 Argparse changed how they format helptext python/cpython#53903

option 1: we can either ignore that particular line, (but that will cause it to possibly change back and forth, so not ideal)

option 2: we lock python version in CI and in precommit to 3.10+, which is also not ideal

option 3 : we use python version in gh action check >= 3.10, but don't enforce python version in the precommit. We document that developers should undo that line if running precommit with python < 3.10

All 3 options are gross to me, but i lean option 3. @yarikoptic ideas, thoughts?

[yarikoptic]

in above usage: output there is now no inner_args, only ... . Ideally should be matched here

[asmacdo]

Updated in last push, hows this?

duct --help

usage: duct [-h] [--version] [-p OUTPUT_PREFIX] [--sample-interval SAMPLE_INTERVAL] [--report-interval REPORT_INTERVAL]
            [-c {all,none,stdout,stderr}] [-o {all,none,stdout,stderr}] [-t {all,system-summary,processes-samples}]
            command [inner_args ...] ...

Gathers metrics on a command and all its child processes.

positional arguments:
  command [inner_args ...]
                        The command to execute, along with its inner arguments.
  inner_args            Arguments for the command.

[yarikoptic]

sorry for being pain, but inner_args is like a jargon which IMHO hard to communicate. Could you consistently rename it to command_args?

[asmacdo]

No pain, command_args is better, +1 Fixed in latest push

[yarikoptic]

All 3 options are gross to me, but i lean option 3. @yarikoptic ideas, thoughts?

option 3 sounds good enough for me too!

[yarikoptic]

Note that original PR intent/description (Add --version) is far from its current purpose/changes.