feat(client): add Pagination component and integrate with Table and pages

- add Pagination component with prev/next, ellipsis page range, and optional page-size selector
- add Pagination and Table pagination stories (WithPagination, WithPaginationAndSizeSelector)
- extend Table with optional pageSize and pageSizeOptions props for built-in client-side pagination
- add Timestamp column to Table story fixtures
- enable pagination on all four pages with pageSize=10 and size selector
- add pagination i18n keys to en.json

client/src/ui/index.ts

@@ -24,5 +24,8 @@ export { ThemeSwitcher } from './ThemeSwitcher/ThemeSwitcher';
 export { Timestamp } from './Timestamp/Timestamp';
 export type { TimestampProps } from './Timestamp/Timestamp';
 
+export { Pagination } from './Pagination/Pagination';
+export type { PaginationProps } from './Pagination/Pagination';
+
 export { Table } from './Table/Table';
 export type { TableProps, TableColumn } from './Table/Table';