Clean up header includes.

raycaster.cpp

@@ -1,7 +1,12 @@
 #include "raycaster.hpp"
-#include "texture.hpp"
+#include "dbc.hpp"
+#include "matrix.hpp"
 #include <algorithm>
-#include "constants.hpp"
+#include <cmath>
+#include <cstdlib>
+#include <fmt/core.h>
+#include <memory>
+#include <numbers>
 
 using namespace fmt;
 using std::make_unique;