feat(cli): flet -V as alternative to flet --version

[tct123]

Description

Test Code

flet -V

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist

• I signed the CLA.
• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• New and existing tests pass locally with my changes
• I have made corresponding changes to the documentation (if applicable)

Screenshots

Additional details

Summary by Sourcery

New Features:

• Added a "-v" shortcut to display the Flet version.

[ndonkoHenri]

-v (or --v) is known to be for verbosity.

[FeodorFitsner]

run command is currently configured as default parser, so flet main.py and flet run main.py are the same. This case indeed -v is conflicting with --verbose (-v is 0 verbosity and -vv is 1 verbosity).

I suggest to rename short version option to -V (uppercase).

[bleudev]

Approved, but with some questions)