[core] Bump React to 19 (2.0)

[DiegoAndai]

Argos is having trouble with #42824 as that PR was created from the next branch. Recreating here to try to fix argos

[mui-bot]

Netlify deploy preview

• docs/data/base/getting-started/quickstart/quickstart.md
• docs/data/joy/getting-started/installation/installation.md
• docs/data/material/getting-started/installation/installation.md
• docs/data/system/getting-started/installation/installation.md

ImageListItem: parsed: -1.34% 😍, gzip: -1.20% 😍
ToggleButtonGroup: parsed: -1.29% 😍, gzip: -1.19% 😍
MenuList: parsed: -1.30% 😍, gzip: -1.15% 😍
AvatarGroup: parsed: -1.22% 😍, gzip: -1.08% 😍
BottomNavigation: parsed: -1.34% 😍, gzip: -1.20% 😍
Accordion: parsed: -1.12% 😍, gzip: -0.98% 😍
@material-ui/core: parsed: -0.16% 😍, gzip: -0.10% 😍
TextField: parsed: -0.53% 😍, gzip: -0.32% 😍
@material-ui/lab: parsed: -0.28% 😍, gzip: -0.18% 😍
TabList: parsed: -0.79% 😍, gzip: -0.43% 😍
SpeedDial: parsed: -0.80% 😍, gzip: -0.43% 😍
Breadcrumbs: parsed: -0.85% 😍, gzip: -0.45% 😍

Bundle size report

Details of bundle changes (Toolpad)
Details of bundle changes

Generated by 🚫 dangerJS against 31f20ab

[DiegoAndai]

The argos failed test comes from the animated progress bar, looks like one of the demos loaded a bit faster so it's sitting at ~5% instead of 0%

Looks good in the preview: https://deploy-preview-44672--material-ui.netlify.app/material-ui/react-progress/#linear-determinate

[DiegoAndai]

Regarding the Next.js 15.0.4 bump, smoke testing the docs looks good

[aarongarciah]

The docs and demos seem to work just fine.

Amazing work! 🎉

[DiegoAndai]

Here's the release notes for Next.js 15: https://github.com/vercel/next.js/releases/tag/v15.0.0

My main concern would be these changes:

• [Breaking] disable client router cache for page segments vercel/next.js#66039
• [Breaking] Disable automatic fetch caching vercel/next.js#66004
• [Breaking] Update Dynamic APIs to be async vercel/next.js#68812

@mui/docs-infra, what do you think?

[mnajdova]

I couldn't find anything broken 👌