option fileName as boolean || function

[stubar]

Is your feature request related to a problem? Please describe.
We name all our SC css files as styles.js, so in dev all our class names are prefixed styles__ which isn't helpful.

Describe the solution you'd like
provide a function that passes either the full path or the File object found in getBlockName(), that way we can completely customise the prefix, in our case the parent folder name would give us required uniqueness.
Describe alternatives you've considered
none

Are you able to assist bring the feature to reality?
yes, I will gladly raise a PR

Additional context

[stale]

Hi everyone! Seems like there hasn't been much going on in this issue lately. If there are still questions, comments, or bugs, please feel free to continue the discussion. Unfortunately, we don't have time to get to every issue. We are always open to contributions so please send us a pull request if you would like to help. Inactive issues will be closed after 30 days. Thanks!

[stale]

Hey there, it's me again! I am going close this issue to help our maintainers focus on the current development roadmap instead. If the issue mentioned is still a concern, please open a new ticket and mention this old one. Cheers and thanks for using Storybook!