Generated applications have an invalid name in Composer 2.0

[srbaker]

When generating an application from the store, it recommends using a CamelCase name, and puts that as name in the composer.json

Since Composer 2.0, the name field must be all lowercase and numbers, and must contain a vendor part i.e. foo/bar or nextcloud/tasks. The validity regex is ^[a-z0-9]([_.-]?[a-z0-9]+)*/[a-z0-9](([_.]?|-{0,2})[a-z0-9]+)*$

(See https://getcomposer.org/doc/04-schema.md#name)

Following the directions for my project FocusFrog generates a composer.json containing "name": "FocusFrog".

I am happy to fix this myself and contribute it, but we need to add a field to the generator that represents "vendor" and I'm not sure how this should be presented to the user.