begin rewrite: add lionkor/commandline

src/TConsole.cpp

@@ -0,0 +1,17 @@
+#include "TConsole.h"
+#include "Compat.h"
+
+TConsole::TConsole() {
+    _Commandline.enable_history();
+    _Commandline.set_history_limit(20);
+    _Commandline.on_command = [](Commandline& c) {
+        auto cmd = c.get_command();
+        if (cmd == "exit") {
+            _Exit(0);
+        } else if (cmd == "clear" || cmd == "cls") {
+            // TODO: clear screen
+        } else {
+            // TODO: execute as lua
+        }
+    };
+}