[core] Add use-client to custom icons

[mj12albert]

Fixes #38023

There are handful of custom icons outside of the /src directory; also packages/mui-icons-material/src/utils/createSvgIcon.js is not returned by findComponents/findHooks even though it needs 'use client' to work.

This PR adds support for:

• additionalPaths?: string[] to handle paths that are outside packages/mui-*/src
• additionalFiles?: string[] to handle arbitrary files that are neither components nor hooks

[mui-bot]

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Generated by 🚫 dangerJS against 8148f6f

[mnajdova]

@mj12albert should we push this forward so that we are complete with the RSC compatibility?

[mj12albert]

@mj12albert should we push this forward so that we are complete with the RSC compatibility?

👌will finish this one this week @mnajdova

[michaldudak]

The build output doesn't contain the "use client" directive on the custom icons. You have to run yarn src:icons in the icons project directory to generate proper intermediate files.

[mj12albert]

The build output doesn't contain the "use client" directive on the custom icons. You have to run yarn src:icons in the icons project directory to generate proper intermediate files.

@michaldudak Updated ~

[michaldudak]

All good!