feat: impl IPackageManifest #1

Author: zacksfF

src/interfaces/IPackageManifest.sol

@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+/// @title IPackageManifest
+/// @notice Interface for EthPM v3 Package Manifest structure based on EIP-2678
+interface IPackageManifest {
+    /// @notice Package Meta Object from EIP-2678
+    struct PackageMeta {
+        string[] authors;      // Human readable names
+        string license;        // SPDX format
+        string description;    // Additional detail
+        string[] keywords;     // Relevant keywords
+        mapping(string => string) links; // URIs (website, docs, repo)
+    }
+    
+    /// @notice Compiler Information Object from EIP-2678
+    struct CompilerInfo {
+        string name;           // Compiler name (e.g., "solc")
+        string version;        // Semver or commit hash format
+    }
+    
+    /// @notice Contract Instance Object from EIP-2678
+    struct ContractInstance {
+        string contractType;   // Reference to Contract Type
+        address instanceAddress; // Deployed address
+    }
+    
+    /// @notice Link Reference Object from EIP-2678
+    struct LinkReference {
+        uint256[] offsets;     // Start positions in bytecode (0-indexed)
+        uint256 length;        // Length in bytes
+        string name;           // Identifier for linking
+    }
+    
+    /// @notice Link Value Object from EIP-2678
+    struct LinkValue {
+        uint256[] offsets;     // Locations where value was written
+        string valueType;      // "literal" or "reference"
+        string value;          // Value to write when linking
+    }
+}