Add MIT license across contracts (#239)

* add licenses across contracts
* fix: Revert license change of StakedAave implementation

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2023 Aave
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

src/contracts/facilitators/aave/interestStrategy/GhoDiscountRateStrategy.sol

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: AGPL-3.0
+// SPDX-License-Identifier: MIT
 pragma solidity 0.8.10;
 
 import {WadRayMath} from '@aave/core-v3/contracts/protocol/libraries/math/WadRayMath.sol';

src/contracts/facilitators/aave/interestStrategy/GhoInterestRateStrategy.sol

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: BUSL-1.1
+// SPDX-License-Identifier: MIT
 pragma solidity 0.8.10;
 
 import {DataTypes} from '@aave/core-v3/contracts/protocol/libraries/types/DataTypes.sol';

src/contracts/facilitators/aave/mocks/EmptyDiscountRateStrategy.sol

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: AGPL-3.0
+// SPDX-License-Identifier: MIT
 pragma solidity 0.8.10;
 
 import {IGhoDiscountRateStrategy} from '../tokens/interfaces/IGhoDiscountRateStrategy.sol';

src/contracts/facilitators/aave/oracle/GhoOracle.sol

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: BUSL-1.1
+// SPDX-License-Identifier: MIT
 pragma solidity 0.8.10;
 
 /**

src/contracts/facilitators/aave/stkAaveUpgrade/interfaces/IGhoVariableDebtToken.sol

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: AGPL-3.0
+// SPDX-License-Identifier: MIT
 pragma solidity 0.7.5;
 
 interface IGhoVariableDebtToken {

src/contracts/facilitators/aave/tokens/GhoAToken.sol

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: BUSL-1.1
+// SPDX-License-Identifier: MIT
 pragma solidity 0.8.10;
 
 import {IERC20} from '@aave/core-v3/contracts/dependencies/openzeppelin/contracts/IERC20.sol';

src/contracts/facilitators/aave/tokens/GhoVariableDebtToken.sol

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: BUSL-1.1
+// SPDX-License-Identifier: MIT
 pragma solidity 0.8.10;
 
 import {IERC20} from '@aave/core-v3/contracts/dependencies/openzeppelin/contracts/IERC20.sol';

src/contracts/facilitators/aave/tokens/base/ScaledBalanceTokenBase.sol

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: AGPL-3.0
+// SPDX-License-Identifier: MIT
 pragma solidity 0.8.10;
 
 import {SafeCast} from '@aave/core-v3/contracts/dependencies/openzeppelin/contracts/SafeCast.sol';

src/contracts/facilitators/aave/tokens/interfaces/IGhoAToken.sol

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: AGPL-3.0
+// SPDX-License-Identifier: MIT
 pragma solidity ^0.8.0;
 
 import {IAToken} from '@aave/core-v3/contracts/interfaces/IAToken.sol';

src/contracts/facilitators/aave/tokens/interfaces/IGhoDiscountRateStrategy.sol

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: AGPL-3.0
+// SPDX-License-Identifier: MIT
 pragma solidity ^0.8.0;
 
 /**

src/contracts/facilitators/aave/tokens/interfaces/IGhoVariableDebtToken.sol

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: AGPL-3.0
+// SPDX-License-Identifier: MIT
 pragma solidity ^0.8.0;
 
 import {IVariableDebtToken} from '@aave/core-v3/contracts/interfaces/IVariableDebtToken.sol';

src/contracts/facilitators/flashMinter/GhoFlashMinter.sol

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: AGPL-3.0
+// SPDX-License-Identifier: MIT
 pragma solidity 0.8.10;
 
 import {IACLManager} from '@aave/core-v3/contracts/interfaces/IACLManager.sol';

src/contracts/facilitators/flashMinter/interfaces/IGhoFlashMinter.sol

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: AGPL-3.0
+// SPDX-License-Identifier: MIT
 pragma solidity ^0.8.0;
 
 import {IERC3156FlashLender} from '@openzeppelin/contracts/interfaces/IERC3156FlashLender.sol';

src/contracts/facilitators/flashMinter/mocks/MockFlashBorrower.sol

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: AGPL-3.0
+// SPDX-License-Identifier: MIT
 pragma solidity 0.8.10;
 
 import {IERC20} from '@openzeppelin/contracts/token/ERC20/IERC20.sol';

src/contracts/gho/ERC20.sol

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: AGPL-3.0-only
+// SPDX-License-Identifier: MIT-only
 pragma solidity ^0.8.0;
 
 import {IERC20} from '@openzeppelin/contracts/token/ERC20/IERC20.sol';

src/contracts/gho/GhoToken.sol

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: AGPL-3.0
+// SPDX-License-Identifier: MIT
 
 pragma solidity ^0.8.0;
 

src/contracts/gho/interfaces/IERC20Burnable.sol

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: AGPL-3.0
+// SPDX-License-Identifier: MIT
 pragma solidity ^0.8.0;
 
 /**

src/contracts/gho/interfaces/IERC20Mintable.sol

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: AGPL-3.0
+// SPDX-License-Identifier: MIT
 pragma solidity ^0.8.0;
 
 /**

src/contracts/gho/interfaces/IGhoFacilitator.sol

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: agpl-3.0
+// SPDX-License-Identifier: MIT
 pragma solidity ^0.8.0;
 
 /**

src/contracts/gho/interfaces/IGhoToken.sol

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: AGPL-3.0
+// SPDX-License-Identifier: MIT
 pragma solidity ^0.8.0;
 
 import {IERC20} from '@openzeppelin/contracts/token/ERC20/IERC20.sol';