refactor(api): restructured API for type safety, maintainability and docs generation

- These changes makes the API incombatible with previous versions
- Added new types for error handling, success responses, and health checks.
- Updated health check logic to utilize the new types for better clarity and structure.
- Refactored existing handlers to improve response consistency and error handling.
- Updated Makefile to include a new target for generating API types from Swagger.
- Updated "new agent" API to respond an encrypted cert pair

internal/config/config.go

@@ -210,7 +210,7 @@ func (cfg *Config) StartServers(opts ...*StartServersOptions) {
 			Name:         "api",
 			CertProvider: cfg.AutoCertProvider(),
 			HTTPAddr:     common.APIHTTPAddr,
-			Handler:      api.NewHandler(cfg),
+			Handler:      api.NewHandler(),
 		})
 	}
 }