feature #39851 [Console] enable describing commands in ways that make the `list` command lazy (nicolas-grekas)
feature #39851 [Console] enable describing commands in ways that make the `list` command lazy (nicolas-grekas)

This PR was merged into the 5.3-dev branch.

Discussion
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[Console] enable describing commands in ways that make the `list` command lazy

| Q             | A
| ------------- | ---
| Branch?       | 5.x
| Bug fix?      | no
| New feature?  | yes
| Deprecations? | no
| Tickets       | Fix #33804
| License       | MIT
| Doc PR        | -

This PR improves the way one can describe a command so that the `list` command can be made lazy:
- when provided using the `$defaultName` property or the `console.command` tag, the name of a command is now exploded using the `|` character. The first name in the list defines the name of the command, the other ones its aliases. When the first name is the empty string, the second name is used instead, and the command is declared as hidden.
- a new `$defaultDescription` static property and a new `description` tag attribute allow for defining the commands' description while registering them.

Together, this is enough to make the `list` command lazy, because this command only accesses each command's name, aliases, hidden-status, and description.

On the implementation side, this PR adds a `LazyCommand` class that proxies regular commands to make them lazy for the target purpose.

This PR will enable support for attributes for configuring a command name+description+etc.
e.g. using the concepts in #39804:
`#[CommandAutoTag(name: 'foo:bar', desc: 'boo', hidden: true)]#`

The attribute could very well split the `hidden` and `aliases` settings apart - while the underlying code and pre-PHP8 apps would use the compact form, because dealing with many static properties + methods would be a maintenance pain imho.

Commits
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8a1a1b8171 [Console] enable describing commands in ways that make the `list` command lazy

symfony/Form