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/Animation.h

@@ -0,0 +1,50 @@
+#pragma once
+#include "Common.h"
+#include <functional>
+
+class Animation
+{
+protected:
+    static constexpr float EPSILON = 0.05;
+    float duration, elapsed;
+    std::function<void()> callback;
+    bool loop;
+	bool complete=false;
+public:
+    //Animation(float, T, T*, std::function<void()>, bool); // lerp
+    //Animation(float, std::vector<T>, T*, std::function<void()>, bool); // discrete 
+    Animation(float, std::function<void()>, bool);
+    //Animation() {};
+    virtual void step(float) = 0;
+    virtual void cancel() = 0;
+    bool isDone();
+};
+
+template<typename T>
+class LerpAnimation: public Animation
+{
+    T startvalue, endvalue;
+    std::function<void(T)> write;
+    void lerp();
+public:
+    ~LerpAnimation() { cancel(); }
+    LerpAnimation(float, T, T, std::function<void()>, std::function<void(T)>, bool);
+    //LerpAnimation() {};
+    void step(float) override final;
+    void cancel() override final;
+};
+
+template<typename T>
+class DiscreteAnimation: public Animation
+{
+    std::vector<T> values;
+    std::function<void(T)> write;
+    float nonelapsed, timestep;
+    int index;
+public:
+    DiscreteAnimation(float, std::vector<T>, std::function<void()>, std::function<void(T)>, bool);
+    DiscreteAnimation() {};
+    ~DiscreteAnimation() { cancel(); }
+    void step(float) override final;
+    void cancel() override final;
+};