Add an option to force a cache refresh when defining a cached event handler

[yassilah]

Describe the feature

I have tried to use the existing options to allow for refreshing a cached endpoint output but haven't really succeeded in doing so. I would suggest adding a simple refresh option to the existing ones to allow for forcing a given endpoint to refresh its original state and store it for future requests. Here's an example usage:

export default defineCachedEventHandler(event => {
  return Math.floor(Math.random() * 5)
}, {
  refresh: event => getQuery(event).refresh === 'true'
})

/api/foo => cache initial value

3

/api/foo?refresh=true => renew cache

4 

/api/foo => use latest cache

4

Additional information

• Would you be willing to help implement this feature?