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.

CMakeLists.txt

@@ -27,6 +27,22 @@ else ()
 			ImGui-SFML::ImGui-SFML)
 endif()
 
+if(TRACE_FRAMES)
+	message("Building with Tracy")
+	add_compile_definitions(TRACE_FRAMES)
+
+	include(FetchContent)
+	FetchContent_Declare(
+			Tracy
+			GIT_REPOSITORY https://github.com/wolfpld/tracy.git
+			GIT_TAG d46ffb4e9f132fc95bdd7d04207d8d669a9d4100
+	)
+	FetchContent_MakeAvailable(Tracy)
+
+	set(LIBS ${LIBS}
+			TracyClient)
+endif()
+
 add_compile_options(-Wall -Wextra)
 
 add_executable(raycasting