feat: add gateway example

contracts/script/gateway-examples/DeployAndRegisterFunction.s.sol

@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import "forge-std/Script.sol";
+import "forge-std/Vm.sol";
+import "forge-std/console.sol";
+import {FunctionVerifier} from "./DummyFunctionVerifier.sol";
+import {SuccinctGateway} from "../../src/SuccinctGateway.sol";
+
+contract DeployAndRegisterFunction is Script {
+    function run() external returns (bytes32, address) {
+        // NOTE: Update FunctionVerifier to the verifier you want to deploy and register from the
+        // Succinct platform.
+
+        vm.startBroadcast();
+
+        // Get the bytecode of the FunctionVerifier contract.
+        bytes memory bytecode = type(FunctionVerifier).creationCode;
+
+        // SuccinctGateway address
+        address gateway = vm.envAddress("SUCCINCT_GATEWAY");
+        console.logAddress(gateway);
+
+        // Create2 salt
+        bytes32 salt = vm.envBytes32("CREATE2_SALT");
+
+        (bytes32 functionId, address verifier) =
+            SuccinctGateway(gateway).deployAndRegisterFunction(msg.sender, bytecode, salt);
+
+        return (functionId, verifier);
+    }
+}