Integrate benchmarks and differential tests against an EVM interpreter (#7)

crates/integration/contracts/Baseline.sol

@@ -0,0 +1,7 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8.24;
+
+contract Baseline {
+    function baseline() public payable {}
+}

crates/integration/contracts/Computation.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: MIT
+
 pragma solidity ^0.8.24;
 
 contract Computation {

crates/integration/contracts/Fibonacci.sol

@@ -1,5 +1,7 @@
 // SPDX-License-Identifier: UNLICENSED
 
+pragma solidity ^0.8.24;
+
 // https://medium.com/coinmonks/fibonacci-in-solidity-8477d907e22a
 
 contract FibonacciRecursive {
@@ -24,9 +26,11 @@ contract FibonacciIterative {
         uint a = 1;
         b = 1;
         for (uint i = 2; i < n; i++) {
-            uint c = a + b;
-            a = b;
-            b = c;
+            unchecked {
+                uint c = a + b;
+                a = b;
+                b = c;
+            }
         }
         return b;
     }

crates/integration/contracts/MSize.sol

@@ -1,5 +1,7 @@
 // SPDX-License-Identifier: MIT
 
+pragma solidity ^0.8.24;
+
 contract MSize {
     uint[] public data;
 

crates/integration/contracts/Value.sol

@@ -1,5 +1,7 @@
 // SPDX-License-Identifier: MIT
 
+pragma solidity ^0.8.24;
+
 contract Value {
     function value() public payable returns (uint ret) {
         ret = msg.value;

crates/integration/contracts/mStore8.sol

@@ -1,5 +1,7 @@
 // SPDX-License-Identifier: MIT
 
+pragma solidity ^0.8.24;
+
 contract MStore8 {
     function mStore8(uint value) public pure returns (uint256 word) {
         assembly {