[Feature Request]: add hook to provide initial vite config

[tobiasdiez]

Is your feature request related to a problem? Please describe

Currently, one can provide an initial vite config in form of a config file. But some (meta) frameworks like nuxt don't have a config file but manage their vite config themselves (and usually provide functions to receive or modify the config). In order to make it easier to use these frameworks, it would be nice if there would be an viteInitial hook that one could use to provide the vite config from those frameworks, and then storybook goes on and modifies this config as it seems fit.

Describe the solution you'd like

Provide viteInitial (in analog to viteFinal) that can be used to provide the initial vite config.

Describe alternatives you've considered

One could use the viteFinal config to merge the storybook config with the frameworks config. However, then one needs to take care of the same things that storybook does under the hood. As an example, vue-vite vue plugin but vue frameworks have their own manually configured vue plugin. So one needs to decide which one to use.

Are you able to assist to bring the feature to reality?

no

Additional context

No response