Refactor: Python 3.12, build libtcod & SFML from source. Cmake build. Directory cleanup

directories needed:
* build - for cmake output
* deps - stuff needed to compile McRogueface (headers)
	libtcod -> ../modules/libtcod/src/libtcod
	sfml -> ../modules/SFML/include/SFML
	python -> ../modules/cpython/Include
* lib - stuff needed to link McRogueFace (shared objects); also required at runtime
	libtcod -> `../modules/libtcod/buildsys/autotools/.libs/libtcod.so.1.0.24`
	sfml -> `../modules/SFML/build/lib/*`
	python -> `../modules/cpython/libpython3.12.so`; standard lib at ../modules/cpython/build/lib.linux-x86_64-3.12 & ../modules/cpython/Lib

You can get dependencies by:
 - Build from source (i.e. all submodules)
 - Go download them from each project's website
 - install packages from your distro and symlink them to deps/lib directories

src/Scene.cpp

@@ -0,0 +1,41 @@
+#include "Scene.h"
+#include "UI.h"
+
+//Scene::Scene() { game = 0; std::cout << "WARN: default Scene constructor called. (game = " << game << ")" << std::endl;};
+Scene::Scene(GameEngine* g)
+{
+    game = g; 
+    ui_elements = std::make_shared<std::vector<std::shared_ptr<UIDrawable>>>();
+}
+void Scene::registerAction(int code, std::string name)
+{
+    actions[code] = name;
+    actionState[name] = false;
+}
+bool Scene::hasAction(std::string name)
+{
+    for (auto& item : actions)
+        if (item.second == name) return true;
+    return false;
+}
+
+bool Scene::hasAction(int code)
+{
+    return (actions.find(code) != actions.end());
+}
+
+std::string Scene::action(int code)
+{
+    return actions[code];
+}
+
+bool Scene::registerActionInjected(int code, std::string name)
+{
+    std::cout << "Inject registered action - default implementation\n";
+    return false;
+}
+
+bool Scene::unregisterActionInjected(int code, std::string name)
+{
+    return false;
+}