Scheduler — Refactor scheduler.d.ts file

[sjbur]

No description provided.

[sjbur]

DateNavigatorItemProperties extends dxButtonGroupOptions, so there is no need for dxButtonGroupOptions here

[Copilot]

Pull request overview

Refactors the Scheduler TypeScript declaration surface to use the public Properties type aliases (instead of the deprecated dxSchedulerOptions) and to reference nested widget types (dxButtonGroup.Item, dxToolbar.Item) consistently across bundled declarations and wrapper typings.

Changes:

• Updated dxScheduler to extend Widget<DevExpress.ui.dxScheduler.Properties> / Widget<Properties> rather than Widget<dxSchedulerOptions>.
• Refined dxSchedulerOptions to Omit and then explicitly redeclare base widget event handlers with Scheduler-specific event types.
• Normalized DateNavigatorItemProperties / ToolbarItem to use dxButtonGroup.Properties + dxButtonGroup.Item and dxToolbar.Item, and adjusted Vue wrapper prop unions accordingly.

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	Aligns bundled Scheduler typings to use DevExpress.ui.dxScheduler.Properties and nested widget Properties/Item types.
packages/devextreme/js/ui/scheduler.d.ts	Refactors Scheduler public typings: Properties-based widget generic, explicit event overrides via Omit, and normalized toolbar/date navigator related types.
packages/devextreme-vue/src/scheduler.ts	Updates Vue wrapper prop typings to match the refactored Scheduler type definitions (removes redundant dxButtonGroupOptions union member).

[mpreyskurantov]

blocked,
should be a feature branch from the upstream remote (not a fork),
in the feature/* name format