feat: add GD proxies

contracts/goodDollar/GoodDollarExchangeProviderProxy.sol

@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+pragma solidity 0.8.18;
+
+import {
+  TransparentUpgradeableProxy
+} from "openzeppelin-contracts-next/contracts/proxy/transparent/TransparentUpgradeableProxy.sol";
+
+contract GoodDollarExchangeProviderProxy is TransparentUpgradeableProxy {
+  constructor(
+    address _logic,
+    address admin_,
+    bytes memory _data
+  ) payable TransparentUpgradeableProxy(_logic, admin_, _data) {}
+}

contracts/goodDollar/GoodDollarExpansionControllerProxy.sol

@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+pragma solidity 0.8.18;
+
+import {
+  TransparentUpgradeableProxy
+} from "openzeppelin-contracts-next/contracts/proxy/transparent/TransparentUpgradeableProxy.sol";
+
+contract GoodDollarExpansionControllerProxy is TransparentUpgradeableProxy {
+  constructor(
+    address _logic,
+    address admin_,
+    bytes memory _data
+  ) payable TransparentUpgradeableProxy(_logic, admin_, _data) {}
+}

contracts/goodDollar/GoodDollarReserveProxy.sol

@@ -0,0 +1,7 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+pragma solidity ^0.5.13;
+
+import "celo/contracts/common/Proxy.sol";
+
+/* solhint-disable-next-line no-empty-blocks */
+contract GoodDollarReserveProxy is Proxy {}