refactor: v2 access and refresh tokens (#20486)

* feat: add refreshTokenExpiresAt to /force-refresh, /exchange/, /refresh

* feat: encode ownerId, expiresAt in tokens & return refresh expires at when creating managed user

* driveby:fix: pass language when creating managed user

* refactor: remove void notation and await access token propagation

* refactor: centralize createOAuthTokens and refreshOAuthTokens logic

* docs: tokens expires at and payload

* chore: comment selectedDate in examples app booker

apps/api/v2/src/modules/jwt/jwt.service.ts

@@ -26,6 +26,10 @@ export class JwtService {
     // divided by 1000 because iat (issued at time) is in seconds (not milliseconds) as informed by JWT specification
     return Math.floor(Date.now() / 1000);
   }
+
+  decode(token: string): Payload {
+    return this.nestJwtService.decode(token) as Payload;
+  }
 }
 
 type Payload = Record<string | number | symbol, any>;