Debug: Support frame tracing via Tracy

Use CMake FetchContent to pull tracy sources and build it if frame tracing is enabled.
As frame tracing requires annotations in the code, create a wrapper that replaces them
with our own defines that are empty when tracing is not enabled.

FrameTracing.h

@@ -0,0 +1,24 @@
+//
+// Created by trotfunky on 05/02/24.
+//
+
+#ifndef RAYCASTING_FRAMETRACING_H
+#define RAYCASTING_FRAMETRACING_H
+
+/*
+ * Basic wrapper to allow enabling and disabling frame tracing using
+ * Tracy.
+ * https://github.com/wolfpld/tracy
+ */
+#ifdef TRACE_FRAMES
+	#include "tracy/Tracy.hpp"
+	#define FTrace_FrameMark FrameMark
+	#define FTrace_Scope ZoneScoped
+	#define FTrace_NamedScope(name) ZoneScopedN(name)
+#else
+	#define FTrace_FrameMark
+	#define FTrace_Scope
+	#define FTrace_NamedScope(name)
+#endif /* TRACE_FRAMES */
+
+#endif //RAYCASTING_FRAMETRACING_H