Support Impression-Level Ad Revenue

[rizbud]

Is your feature request related to a problem? Please describe.
This plugin does not expose Impression-Level Ad Revenue data from the Google Mobile Ads SDK.

Describe the solution you'd like
Expose an onAdPaid (or similar) event that forwards ILAR data from the native SDK.
Example:

AdMob.addListener('onAdPaid', (event: Payload) => {
  console.log(event);
});

// Payload
type Payload = {
  adUnitId: string;
  adFormat: string;
  valueMicros: number;
  currencyCode: string;
  precisionType: string;
}

Describe alternatives you've considered
N/A

Additional context
Impression-Level Ad Revenue is essential for:

• LTV calculation
• ROAS optimization
• Mediation analysis
• Advanced analytics integration

Reference: https://support.google.com/admob/answer/11322405