[BE] Create job to save exchange rates from external API

[Eugeniosales]

Description:

Create job to get every single minute the exchange rates with BRL Base from exchangeRates API and save data in ExchangeRate table in DynamoDB.

Exchange Rates External API: https://exchangeratesapi.io/documentation/

Acceptance criteria:

• [x] Add rule update-exchange-rate-rule no EventBridge para agendamento de evento por minuto
• [x] Add SQS update-exchange-rate-queue to receive events from rule
• [x] Add lambda UpdateExchangeRate of ExchangeRate domain triggered by SQS
• [x] Create ExchangeRate table in DynamoDB
• [x] Add unit test to business and adapters layer