multiwrap and pack common features

Author: Yash

contracts/feature/TokenBundle.sol

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+// SPDX-License-Identifier: Apache-2.0
+pragma solidity ^0.8.0;
+
+import "./interface/ITokenBundle.sol";
+
+abstract contract TokenBundle is ITokenBundle {
+    
+}

contracts/feature/interface/ITokenBundle.sol

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+// SPDX-License-Identifier: Apache-2.0
+pragma solidity ^0.8.0;
+
+interface ITokenBundle {
+
+    enum TokenType {
+        ERC20,
+        ERC721,
+        ERC1155
+    }
+
+    struct Token {
+        address assetContract;
+        TokenType tokenType;
+        uint256 tokenId;
+        uint256 totalAmountPacked;
+        
+    }
+
+    struct BundleInfo {
+        uint256 count;
+        string uri;
+        mapping(uint256=>Token) tokens;
+    }
+
+}