Tinkering with input

I want to move keyboard input defs to the Python API. I laid the groundwork for it today.

From the JANKFILE:

- working on API endpoint `_registerInputAction`.

it will add "_py" as a suffix to the action string and register it along with other scene actions.

- Adding public Scene methods. These are on the base class with default of return `false`.

`bool Scene::registerActionInjected(int code, std::string name)` and `unregisterActionInjected`

the PythonScene (and other scenes that support injected user input) can override this method, check existing registrations, and return `true` when succeeding.

Also, upgraded to C++20 (g++ `c++2a`), mostly because I want to use map::contains.

src/MenuScene.cpp

@@ -4,7 +4,7 @@
 MenuScene::MenuScene(GameEngine* g) : Scene(g)
 {
     text.setFont(game->getFont());
-    text.setString("McRogueFace Engine - LGJ 2023 (Incomplete)");
+    text.setString("McRogueFace Engine - r/RoguelikeDev Tutorial 2023");
     text.setCharacterSize(24);
     //std::cout << "MenuScene Initialized. " << game << std::endl;
     //std::cout << "Font: " << game->getFont().getInfo().family << std::endl;