add initial project files including .gitignore, editor settings, and Two Sum implementation

Easy/TwoSum/TwoSum.cpp

@@ -0,0 +1,20 @@
+//
+// Created by bob on 12/04/2026.
+//
+
+#include "TwoSum.h"
+
+class Solution {
+public:
+    vector<int> twoSum(vector<int>& nums, int target) {
+        for (int j = 0; j < nums.size(); j++)
+        {
+            for (int i = 1; i < nums.size(); i++)
+            {
+                if (nums[j]+nums[i] == target)
+                { return {i, j}; }
+            }
+        }
+        return {};
+    }
+};