fix(cli): prevent Typer from collapsing 'create' command

[dzungtran89]

When a Typer app has only one command, it collapses it into the main app entry point.
This causes odoo-venv create 18.0 to fail, as 'create' is interpreted as the
version argument and '18.0' as an unexpected extra argument.

This commit adds a callback to the Typer app to force the subcommand structure,
ensuring odoo-venv create ... works as expected.

[nilshamerlinck]

• nice catch!
• looking at my notes, I realize indeed that I took the habit not to add the create command when running odoo-venv
• given that more commands will come and that we teached agents to use create already in our skill, we should honor create
• ok for you @trisdoan ?

[trisdoan]

Thanks anh Dung