fix: export types were published incorrectly (#29548)

[mpreyskurantov]

Cherry-pick of:

• fix: export types were published incorrectly #29548

[Copilot]

Pull request overview

Fixes how Excel exporter-related types are surfaced in generated typings by moving CellAddress/CellRange to a shared internal definition and re-exporting them through the intended public entrypoints, while also adjusting documentation visibility for several helper types.

Changes:

• Reworked CellAddress / CellRange to be defined once and re-exported (instead of duplicated interface declarations).
• Added DevExpress.exportInternal type container (and mapped public DevExpress.excelExporter types to it).
• Marked several helper/public-facing-but-doc-unwanted types as @hidden in .d.ts files; updated wrapper exports to include the Excel cell range/address types.

Reviewed changes

Copilot reviewed 3 out of 14 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/devextreme/ts/dx.all.d.ts	Replaced CellAddress/CellRange interfaces with aliases and introduced DevExpress.exportInternal module in the bundled typings.
packages/devextreme/js/exporter/export_load_panel.d.ts	Marked ExportLoadPanel as hidden for doc generation.
packages/devextreme/js/excel_exporter.types.d.ts	Removed local CellAddress/CellRange definitions and re-exported them from a shared types file.
packages/devextreme/js/excel_exporter.d.ts	Adjusted exports so CellAddress/CellRange come from common/export/excel.
packages/devextreme/js/events/events.types.d.ts	Hid DxEvent in docs.
packages/devextreme/js/data/data_source.d.ts	Hid DataSourceLike in docs.
packages/devextreme/js/core/utils/deferred.d.ts	Hid DxPromise in docs.
packages/devextreme/js/core/templates/template.d.ts	Hid dxTemplateOptions in docs.
packages/devextreme/js/core/element.d.ts	Hid DxElement / UserDefinedElement in docs.
packages/devextreme/js/common/export/excel.types.d.ts	Added new shared internal type declarations for Excel export (CellAddress, CellRange).
packages/devextreme/js/common/export/excel.d.ts	Re-exported CellAddress/CellRange publicly via type aliases and used them in exported APIs.
packages/devextreme-vue/src/common/export/excel.ts	Re-exported CellAddress/CellRange from devextreme Excel export entry.
packages/devextreme-react/src/common/export/excel.ts	Re-exported CellAddress/CellRange from devextreme Excel export entry.
packages/devextreme-angular/src/common/export/excel/index.ts	Re-exported CellAddress/CellRange from devextreme Excel export entry.