Use last command's help/version flags.

[BrianPugh]

Kind of resolves #219.

The issue was that if a command wants to use a parameter like --version or --help, the version/help flag system swallows it and gets priority. Previously, only the help/version flags of the root app were used; now the help/version flags of the resolved command are used (more intuitive/correct).

@OrHayat with this PR, you can use version in your command as the following:

# notice the `version_flags`
@app.command(name="print-control-file", version_flags=[])
def print_control(version:Annotated[str|None,Parameter(help="control file version")]):
    x=f"""Package: <package name>
Version:{version}-release
Architecture: amd64
Section: admin
Priority: optional
Depends: python3,lsof
Recommends:
"""
    print(x)

I think I would like for the command to automatically have precedence over the help/version flags, but I don't think that will be possible until cyclopts v3.

Keeping this as a draft as I'm not totally satisfied with the solution; I want to think about it a little more.

[codecov]

Codecov Report

Attention: Patch coverage is 92.30769% with 1 line in your changes missing coverage. Please review.

Project coverage is 95.50%. Comparing base (729f2b9) to head (8035bcc).

Files	Patch %	Lines
cyclopts/core.py	91.66%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #220      +/-   ##
==========================================
+ Coverage   95.49%   95.50%   +0.01%     
==========================================
  Files          23       23              
  Lines        2107     2114       +7     
  Branches      539      542       +3     
==========================================
+ Hits         2012     2019       +7     
  Misses         46       46              
  Partials       49       49              

Flag	Coverage Δ
unittests	95.22% <92.30%> (+0.01%)	⬆️

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[BrianPugh]

alright, so I have decided to go forward with this. Worst case, it's more intuitive before and allows for the very reasonable use-case in #219.

In cyclopts v3 I will probably try to have the command's parameters get priority over version/help-flags.

[BrianPugh]

there is a bit of ??? around which app's version_print and help_print should be used, but I think we can punt on that issue for now.