• I'd be willing to implement this feature (contributing guide)
• This feature is important to have in this repository; a contrib plugin wouldn't do

Describe the user story

When a plugin is imported with yarn plugin import it would be beneficial for the plugin to have possibility to call methods after the import has completed. The same goes for yarn plugin remove so that the plugin can modify the repository before the plugin is actually removed. This use case is for plugins that handle custom versions for plugins such as https://github.com/backstage/backstage/tree/master/packages/yarn-plugin

Describe the solution you'd like

Add new hooks:

• pluginPostImport - called after the plugin has been imported to the repository
• pluginPreRemove - called before the plugin has been removed from the repository

Describe the drawbacks of your solution

None

Describe alternatives you've considered

This cannot be achieved with plugin so it should be part of the yarn core.