ci(public api): add GridSelectionRange to public api (#10916)

Closes 10870

Co-authored-by: Hristo <[email protected]>

Author: katherinedragieva

projects/igniteui-angular/src/public_api.ts

@@ -136,3 +136,4 @@ export { IChipResourceStrings } from './lib/core/i18n/chip-resources';
 export { IActionStripResourceStrings } from './lib/core/i18n/action-strip-resources';
 export { PickerInteractionMode } from './lib/date-common/types';
 export { SplitterType } from './lib/splitter/splitter.component';
+export { GridSelectionRange } from './lib/grids/common/types';