add a bunch of dynamic frontend plugin configs

[christoph-jerolimov]

@davidfestal @gashcrumb @kadel are you fine with this?

Filename is used in some places already and we can align that later, of course. Or should we rename it directly to something like app-config.default.yaml?

Shipping these configs as a default, would make the usage of these plugins muuuuch easier.

[christoph-jerolimov]

/publish

[github-actions]

PR action (/publish) cancelled: PR doesn't touch only 1 workspace.

[davidfestal]

Thanks for adding these configurations.
We still have to define where to put those, especially in conjunction with the the work related to marketplace package catalog entities.

[github-actions]

The file versions.json could not be synced from branch main into this because your PR is from a fork.

You should update the versions.json file with the following content:

{
    "backstage": "1.42.5",
    "node": "22.19.0",
    "cli": "1.8.0",
    "cliPackage": "@red-hat-developer-hub/cli"
}