feat: add "SetPermission" bootstrap script

docs: change license in BaseScript

script/bootstrap/SetPermission.s.sol

@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: MIT
+pragma solidity >=0.8.18 <0.9.0;
+
+import { IPRBProxy } from "../../src/interfaces/IPRBProxy.sol";
+import { IPRBProxyHelpers } from "../../src/interfaces/IPRBProxyHelpers.sol";
+
+import { BaseScript } from "../shared/Base.s.sol";
+
+/// @notice Bootstraps the proxy system by giving permission to an envoy and installing a plugin.
+contract SetPermission is BaseScript {
+    function run(IPRBProxy proxy, IPRBProxyHelpers helpers, address target) public broadcaster {
+        // ABI encode the call to `setPermission`.
+        address envoy = vm.addr(vm.deriveKey(mnemonic, 1));
+        bool permission = true;
+        bytes memory data = abi.encodeCall(helpers.setPermission, (envoy, target, permission));
+
+        // Execute the call to the enshrined target.
+        proxy.execute(address(helpers), data);
+    }
+}

script/shared/Base.s.sol

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: BUSL-1.1
+// SPDX-License-Identifier: MIT
 pragma solidity >=0.8.18 <0.9.0;
 
 import { Script } from "forge-std/Script.sol";