Adds a "Delete All" button and confirmation dialog to the Providers page.
Introduces `isDeletingAll`, `executeDeleteAll`, `showDeleteAllConfirmation`,
and `setShowDeleteAllConfirmation` states and functions in `useProvidersPresenter`.
Implements the `executeDeleteAll` logic to call the new `authFilesApi.deleteAll`
endpoint. Adds the `deleteAll` method to `authFilesApi` to send a DELETE
request to `/auth-files?all=true`. Includes new internationalization keys
for "Delete All" related texts across all locales. Bumps the application
version to `1.1.0` in `package.json`, `Cargo.toml`, and `tauri.conf.json`.

This provides users with a convenient and efficient way to remove all their
connected provider accounts simultaneously, improving account management.
It also ensures a consistent and localized user experience for this new
functionality and reflects the new feature set in the application's version.

Adds a button to copy the refresh token for each provider directly from the UI.
This allows users to easily retrieve their refresh tokens for debugging or other uses.
Introduces a `copyRefreshToken` function in the presenter to handle the logic.
Adds a new API endpoint to download the content of an authentication file.
Updates the `AuthFile` type to include an optional `name` property.
Adds corresponding translation keys for the new functionality.

Adds a new "Copy All" button to the Providers page, allowing users to copy refresh tokens from multiple selected providers.

This feature includes:
- A new dialog for selecting providers to include in the copy operation.
- State management in `useProvidersPresenter` for the modal, selection, and copying process.
- Logic to fetch and concatenate refresh tokens from selected providers.
- Clipboard integration to copy the combined refresh tokens.
- Internationalization support for new strings related to "Copy All" functionality.

This enhances user convenience by providing a bulk action for managing refresh tokens.