feat: add initial commands

main.cpp

@@ -2,9 +2,24 @@
 
 #include "CalculatorCli.hpp"
 
+constexpr std::array kInitialCommands{
+    std::string_view{"a = 2 + 3"},
+    std::string_view{"b = e - 2"},
+    std::string_view{"c = 1 + 2"},
+    std::string_view{"d = e / 3"},
+    std::string_view{"e = a + c"},
+    std::string_view{"f = 3 + 4"},
+    std::string_view{"undo 2"},
+    std::string_view{"e = 2 + 2"},
+    std::string_view{"f = g * 7"},
+};
+
 auto main() -> int
 {
     CalculatorCli cli;
+    for (const auto commands : kInitialCommands) {
+        cli.parse(commands);
+    }
     cli.runLoop();
     return 0;
 }