Added Bubble Sort algorithm implementation in Solidity

Sorting/BubbleSort.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+/**
+ * @title BubbleSort
+ * @dev Implementation of Bubble Sort algorithm in Solidity.
+ *      This function sorts an array of unsigned integers in ascending order.
+ */
+contract BubbleSort {
+    function bubbleSort(uint[] memory arr) public pure returns (uint[] memory) {
+        uint n = arr.length;
+        for (uint i = 0; i < n - 1; i++) {
+            for (uint j = 0; j < n - i - 1; j++) {
+                if (arr[j] > arr[j + 1]) {
+                    uint temp = arr[j];
+                    arr[j] = arr[j + 1];
+                    arr[j + 1] = temp;
+                }
+            }
+        }
+        return arr;
+    }
+}

Sorting/testSort.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import "remix_tests.sol";
+import "../Sorting/BubbleSort.sol";
+
+contract TestBubbleSort {
+    BubbleSort sorter;
+
+    function beforeAll() public {
+        sorter = new BubbleSort();
+    }
+
+    function testSorting() public {
+        uint ;
+        arr[0] = 9;
+        arr[1] = 3;
+        arr[2] = 7;
+        arr[3] = 1;
+        arr[4] = 5;
+
+        uint[] memory result = sorter.bubbleSort(arr);
+        Assert.equal(result[0], uint(1), "First element should be 1");
+        Assert.equal(result[4], uint(9), "Last element should be 9");
+    }
+}