Add source code.

include/Table.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#include <cstddef>
+#include <string>
+#include <vector>
+
+class TextTable {
+public:
+    explicit TextTable(const std::vector<std::string>& headers);
+
+    void addRow(const std::vector<std::string>& cells);
+    std::size_t rowCount() const;
+    std::string render() const;
+
+private:
+    std::vector<std::string> headers_;
+    std::vector<std::vector<std::string>> rows_;
+};