Add remote smart contract and gRPC connection support

Add Remote field to SmartContractCreateRequest and GrpcConnectionInfo
struct to SmartContract model for remote smart contract execution
via gRPC.

models/models.go

@@ -78,6 +78,7 @@ type SmartContractCreateRequest struct {
 	ExecutionOrder       string            `json:"executionOrder"`
 	EnvironmentVariables map[string]string `json:"environmentVariables,omitempty"`
 	Secrets              map[string]string `json:"secret,omitempty"`
+	Remote               bool              `json:"remote,omitempty"`
 }
 
 type SmartContractUpdateRequest struct {
@@ -101,6 +102,13 @@ type SmartContract struct {
 
 	EnvVars map[string]string `json:"envVars"`
 	Secrets []string          `json:"secrets"`
+
+	GrpcConnectionInfo *GrpcConnectionInfo `json:"grpcConnectionInfo,omitempty"`
+}
+
+type GrpcConnectionInfo struct {
+	Address string `json:"address"`
+	ApiKey  string `json:"apiKey,omitempty"`
 }
 
 type SmartContractExecutionInfo struct {