v9.0.0-alpha.2
[website] Add React PDF Kit as gold sponsor (#47902)
[docs][blog] Remove all mentions of Discord server (#47858)
[docs] Move shared components to @mui/docs package (#47672)
[code-infra] Upgrade react-docgen to v8 (#47685)
[docs-infra] Reapply Cookie Banner with Design Fixes (#47744)
[code-infra] Convert a few docs modules to ts (#45548)
[material-nextjs] Add option to enable CSS layers for pages router (#45596)
[docs] Add docs and website banner for Dev survey'25 (#47521)
[material-ui][Hidden] Remove deprecated Hidden component (#45283)
[website] Update Base UI links in header dropdown on main site (DX-111) (#47517)
[code-infra] Enable undefined addition to optional properties (#47750)
[code-infra] Vitest test migration (#44325)