feat: replace browser built-in alert/confirm/prompt pop-up with new DialogProvider

src/components/common/index.ts

@@ -2,4 +2,6 @@ export { default as KGDropdown } from './KGDropdown';
 export { default as Playhead } from './Playhead';
 export { default as FileImportModal } from './FileImportModal'; 
 export { default as LoadingOverlay } from './LoadingOverlay';
-export { default as OpenProjectModal } from './OpenProjectModal';
+export { default as OpenProjectModal } from './OpenProjectModal';
+export { default as DialogProvider, showAlert, showConfirm, showPrompt } from './DialogProvider';
+export type { ConfirmOptions, PromptOptions } from './DialogProvider';