Feature Request: Recursive search in customCollections directories

[Flashantik]

Currently, when using the customCollections configuration in Nuxt/icon module, it only searches for icons in the specified directory but does not look into nested subdirectories.
For example, if I set:

// nuxt.config.js
export default defineNuxtConfig({
  modules: ['nuxt-icon'],
  icon: {
    customCollections: {
      'my-collection': '/path/to/icons'
    }
  }
})

The module will only find icons directly inside /path/to/icons but not in /path/to/icons/subfolder/.

Requested Feature
I would like the module to support recursive searching in customCollections directories, allowing it to find icons in all nested subdirectories like wor

Steps to Reproduce
https://stackblitz.com/edit/github-monhzc