Add <Timer> Component

[ericdellacasa8]

Context

@unlayer/exporters exposes TimerExporters and TimerDefaults, but Elements does not currently expose a React <Timer> component.

This should be a clean component addition following the same factory pattern used by existing components such as <Button> and <Divider>.

Definition of Done

Add a React <Timer> component to Elements.

The component should:

• Use the existing TimerExporters and TimerDefaults
• Follow the same factory pattern used by existing components
• Render correctly across supported output modes
• Be exported from the package entry point
• Include a Storybook story
• Include snapshot or render tests
• Include basic usage documentation

Example Outcome

A developer should be able to import and use <Timer> like other Elements components.

For example:

import { Timer } from "@unlayer/elements";

export function PromoEmail() {
  return (
    <Timer />
  );
}

The component should behave consistently with the exporter-backed components already available in Elements.

Where to Start

Useful references already exist in the codebase:

• packages/react/src/components/Button.tsx
• packages/react/src/components/Divider.tsx
• packages/react/src/utils/create-component.tsx
• @unlayer/exporters Timer exports

The goal is to add <Timer> using the same pattern as existing exporter-backed components.