GitLab

- Updated config loading in `cmd/app/config.go` to use JSON instead of YAML
- Modified `internal/service/waf.go` to read WAF rules from JSON file
- Removed YAML library imports and replaced with JSON unmarshaling
- Updated file extensions from `.yaml` to `.json` in file reading logic

- Introduced new API endpoint and service method to enable/disable WAF for multiple listeners
- Updated router, controller, and service to support bulk listener WAF operations
- Added new request type `EnableListenerWafsReq` to handle multiple listener configurations
- Implemented logic to add or remove WAF configurations for specific listeners based on input