Support for Renovate configurations for use by UnJS users

[shinGangan]

Describe the feature

Currently, the config provided in this repository is for UnJS package developers.
Therefore, there is no config for users who are developing with UnJS.
We have also observed cases where the UnJS package has not been updated by checking the Nuxt family repositories.

Therefore, we would like to support a config for users who are developing with UnJS.

Usage example

for developing UnJS

{
  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
  "extends": [
    "github>unjs/renovate-config"
  ]
}

for developing with UnJS

{
  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
  "extends": [
    "github>unjs/renovate-config:unjs"
  ]
}

The following commits have been experimentally configured. I can create a PR at any time.

• shinGangan@2aba2c0

Additional information

• Would you be willing to help implement this feature?

[shinGangan]

Hi @NozomuIkuta .

The priority here is quite low. I would be happy to receive your comments when you are time. 🙏