Fix assets path issue for "compound-design-tokens" package

[menturion]

The fix, given here #26069, does not work if one clone the compound-design-tokens package separately and link it within the matrix-react-sdk, because the regex /@vector-im(?:\\|\/)compound-(.*?)(?:\\|\/)/ does not match the different paths that does not contain the string @vector-im, see below (Cloned & linked package):

Resource paths (on Windows) are e.g. ...

• Not linked package -
  resourcePath: C:\src\matrix-react-sdk\node_modules\@vector-im\compound-design-tokens\icons\chat-solid.svg

• Cloned & linked package -
  resourcePath: C:\src\compound-design-tokens\icons\chat-solid.svg

Problem:
The main problem is not whether absolute vs relative paths but that the compound-design-tokens package does not have a dist or res subfolder to serve the assets so that the existing regex /^.*[/\\](dist|res)[/\\]/ does not match.

Solution:
The solution is to add the missing root folder name for the assets to the above regex, with ...
/^.*[/\](dist|res|compound-design-tokens)[/\]/

I have tested this for both scenarios (linked/not linked) on Windows and it works with the regex statement:

const prefix = /^.*[/\\](dist|res|compound-design-tokens)[/\\]/;

The full part regarding compoundImportsPrefix is in this case obsolete and can be removed in the webpack.config.js.

Signed-off-by: menturion [email protected]

---

This PR currently has none of the required changelog labels.

A reviewer can add one of: T-Deprecation, T-Enhancement, T-Defect, T-Task to indicate what type of change this is, or add Type: [enhancement/defect/task] to the description and I'll add them for you.

[github-actions]

Thanks for opening this pull request, unfortunately we do not accept contributions from the main branch of your fork, please re-open once you switch to an alternative branch for everyone's sanity. See https://github.com/matrix-org/matrix-js-sdk/blob/develop/CONTRIBUTING.md

[menturion]

Created a new PR #26646.
Sorry, my bad.