Scheduler — Refactor scheduler.d.ts file

[sjbur]

No description provided.

[Copilot]

Pull request overview

This PR refactors the Scheduler TypeScript declaration surface to align with the newer Properties/Item type-alias patterns used across DevExtreme and to simplify/normalize scheduler-related JSDoc/type references. It also updates the aggregated dx.all.d.ts bundle and adjusts Vue wrapper typings accordingly.

Changes:

• Switches dxScheduler generics to use DevExpress.ui.dxScheduler.Properties / Properties aliases.
• Refactors DateNavigatorItemProperties to extend dxButtonGroup.Properties and use dxButtonGroup.Item.
• Updates Scheduler event typings/JSDoc, including changes to AppointmentUpdatingEvent.oldData/newData.

Reviewed changes

Copilot reviewed 1 out of 3 changed files in this pull request and generated no comments.

File	Description
packages/devextreme/ts/dx.all.d.ts	Updates bundled Scheduler declarations to use Properties/Item aliases and reflects event type changes.
packages/devextreme/js/ui/scheduler.d.ts	Refactors Scheduler public typings (imports, aliases, event payload types, and JSDoc cleanup).
packages/devextreme-vue/src/scheduler.ts	Updates Vue wrapper typings related to Scheduler toolbar item options.

Comments suppressed due to low confidence (1)

packages/devextreme-vue/src/scheduler.ts:126

• packages/devextreme-vue/src/** is generated output. Direct edits to this file are likely to be overwritten and can desync from the generators; update the generator/templates and rerun regeneration (e.g., pnpm run regenerate-all) instead of committing manual changes here.

import {
 dxButtonGroupItem,
 ContentReadyEvent as ButtonGroupContentReadyEvent,
 DisposingEvent as ButtonGroupDisposingEvent,
 InitializedEvent as ButtonGroupInitializedEvent,