v9.0.0
[website] Scheduler sections in Pricing Table (#47816)
[docs][blog] Remove all mentions of Discord server (#47858)
[code-infra] Setup workflow to publish internal packages (#47952)
[internal] Prepare libraries for v9 stable release (#48206)
[docs] Add docs and website banner for Dev survey'25 (#47521)
[material-ui][Hidden] Remove deprecated Hidden component (#45283)
[docs-infra] Add scheduler to product switcher (#48208)
[code-infra] Enable undefined addition to optional properties (#47750)
[core] Remove Joy UI code and docs (#47939)