IAV-1317 : update credit management with monthly credit counts and email notifications
- Updated pom.xml to use iavia-common version 0.0.167-RELEASE.
- Introduced EmailConstant class for email notification messages.
- Enhanced CreateProductRequest and CreateProductResponse to include monthly credit counts.
- Modified StripePriceResponse and StripeProductResponse to accommodate monthly credit counts.
- Updated StripeProductMapper and StripeProductServiceImpl to handle new credit count logic.
- Refactored CreditEmailServiceImpl to utilize EmailConstant for notification messages.
- Added DateUtils method for formatting dates in French.
- Adjusted StripeWebhookServiceImpl to calculate credits based on monthly credit counts.
Closes IAV-1317