feat(ui): add items per page persistence to DataTable

[luizhf42]

This pull request introduces a user preference feature that allows the number of items displayed per page in various data tables to be persisted on a per-table basis using localStorage. This ensures that when users revisit a table, their preferred items-per-page setting is retained. The implementation is integrated across both admin and user-facing tables, and comprehensive tests have been added to verify the new behavior.

• Added a new composable, useTablePreference, which provides getItemsPerPage and setItemsPerPage functions to store and retrieve the user's preferred items-per-page for each table using localStorage. This includes robust error handling for localStorage failures.
• Updated the DataTable component to accept a new optional tableName prop. When provided, the component loads the initial items-per-page value from localStorage and persists any changes to it.
• Passed the new table-name prop to all relevant table components (e.g., SessionList, DeviceList, UserList, FirewallRulesList, etc.), both in the admin and user interfaces, with unique names for each table. [
• Added a dedicated test suite for the new persistence logic in DataTable.spec.ts, covering loading from localStorage, saving changes, and error handling.
• Updated relevant test snapshots to reflect the addition of the table-name prop and minor changes in the rendered markup.