fix: register commands properly with sf7

[simPod]

• [ ] Added automated tests
• [ ] Documented for all relevant versions
• [x] Updated the changelog

Changes

Breaking changes

SF7 stopped using $defaultName to fetch command name. The best and easiest way seems to be to init the command with the name set.

[spawnia]

• Does this still work with older versions?
• Should we add a TODO to $defaultName to remove it when dropping support for symfony/console: <7?

[simPod]

Does this still work with older versions?

yes it does, at least with v6. I cannot install v5 as it's too old.

I think we can even drop $defaultName now but maybe there's some purpose for it that I have not discovered.

[spawnia]

I will have to try this with v5.

[simPod]

this will work with sf5 as well