[docs] Add documentation for preventing SSR flicker/FOUC with the Next.js app router about material-ui

[arthurbalduini]

Hello @MikeLautensack, your issue seems to be related to @mui/material and not to this repo @mui/mui-x
I'm moving the issue to the correct repo so the correspondent maintainers can help you! 🙂

[siriwatknp]

@MikeLautensack In the next version of Material UI v6, you can replace the getInitColorSchemeScript with InitColorSchemeScript component. For more detail, check out the documentation page.

[MikeLautensack]

@MikeLautensack In the next version of Material UI v6, you can replace the getInitColorSchemeScript with InitColorSchemeScript component. For more detail, check out the documentation page.

Great news! I was on the v5 docs. I appreciate the help!

[MikeLautensack]

@MikeLautensack In the next version of Material UI v6, you can replace the getInitColorSchemeScript with InitColorSchemeScript component. For more detail, check out the documentation page.

I seem to be encountering an issue where the InitColorSchemeScript comp and the extend theme api are failing to build on vercel while building successfully on my local machine.

[MikeLautensack]

UPDATE: It is also failing locally now

Here are the relavant deps