Misleading documentation of --init

[TysonAndre]

An actual example is vendor/bin/psalm --init script 1

There's no --level flag. [level=3] would be clearer. Including the value of the level in the error message would make it clearer that level= shouldn't be part of the CLI invocation. (Or mentioning an example invocation)

• Another possible approach would be to a --level/--init-level flag? If more flags for init get added, providing an un-named list would get unwieldly.
• As an example, a user might want to provide multiple source directories?

The current help text:

    -i, --init [source_dir=src] [--level=3]
        Create a psalm config file in the current directory that points to [source_dir]
        at the required level, from 1, most strict, to 6, most permissive

[muglug]

Thanks!