refactor(interfaces): use caret pragma ranges instead of exact versions

- Dual-version interfaces: ^0.7.x || ^0.8.0 (max compatibility)
- V0.8-only interfaces: ^0.8.22 (modern features support)

Interfaces should allow wider compiler version ranges for external
consumer compatibility, while implementations use exact versions for
predictable compilation. Dual-version files use ^0.8.0 since they
can't leverage v0.8 features anyway. V0.8-only files use ^0.8.22 for
custom errors and named mappings.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: RembrandtK

packages/interfaces/contracts/contracts/arbitrum/IArbToken.sol

@@ -27,7 +27,7 @@
  * @title Minimum expected interface for L2 token that interacts with the L2 token bridge (this is the interface necessary
  * for a custom token that interacts with the bridge, see TestArbCustomToken.sol for an example implementation).
  */
-pragma solidity ^0.7.6 || 0.8.27;
+pragma solidity ^0.7.6 || ^0.8.0;
 
 /**
  * @title Arbitrum Token Interface

packages/interfaces/contracts/contracts/arbitrum/IBridge.sol

@@ -23,7 +23,7 @@
  *
  */
 
-pragma solidity ^0.7.6 || 0.8.27;
+pragma solidity ^0.7.6 || ^0.8.0;
 
 // TODO: Re-enable and fix issues when publishing a new version
 // solhint-disable gas-indexed-events

packages/interfaces/contracts/contracts/arbitrum/IInbox.sol

@@ -23,7 +23,7 @@
  *
  */
 
-pragma solidity ^0.7.6 || 0.8.27;
+pragma solidity ^0.7.6 || ^0.8.0;
 
 import { IBridge } from "./IBridge.sol";
 import { IMessageProvider } from "./IMessageProvider.sol";

packages/interfaces/contracts/contracts/arbitrum/IMessageProvider.sol

@@ -23,7 +23,7 @@
  *
  */
 
-pragma solidity ^0.7.6 || 0.8.27;
+pragma solidity ^0.7.6 || ^0.8.0;
 
 /**
  * @title Message Provider Interface

packages/interfaces/contracts/contracts/arbitrum/IOutbox.sol

@@ -23,7 +23,7 @@
  *
  */
 
-pragma solidity ^0.7.6 || 0.8.27;
+pragma solidity ^0.7.6 || ^0.8.0;
 
 // TODO: Re-enable and fix issues when publishing a new version
 // solhint-disable gas-indexed-events

packages/interfaces/contracts/contracts/arbitrum/ITokenGateway.sol

@@ -23,7 +23,7 @@
  *
  */
 
-pragma solidity ^0.7.3 || 0.8.27;
+pragma solidity ^0.7.3 || ^0.8.0;
 
 /**
  * @title Token Gateway Interface

packages/interfaces/contracts/contracts/base/IMulticall.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
-pragma solidity ^0.7.6 || 0.8.27;
+pragma solidity ^0.7.6 || ^0.8.0;
 pragma abicoder v2;
 
 /**

packages/interfaces/contracts/contracts/curation/ICuration.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
-pragma solidity ^0.7.6 || 0.8.27;
+pragma solidity ^0.7.6 || ^0.8.0;
 
 /**
  * @title Curation Interface

packages/interfaces/contracts/contracts/curation/IGraphCurationToken.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
-pragma solidity ^0.7.6 || 0.8.27;
+pragma solidity ^0.7.6 || ^0.8.0;
 
 import { IERC20Upgradeable } from "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol";
 

packages/interfaces/contracts/contracts/discovery/IGNS.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
-pragma solidity ^0.7.6 || 0.8.27;
+pragma solidity ^0.7.6 || ^0.8.0;
 
 /**
  * @title Interface for GNS