feat: engine as library

sandbox/CMakeLists.txt

@@ -0,0 +1,10 @@
+set(SANDBOX_TARGET sandbox)
+
+add_executable(${SANDBOX_TARGET} src/main.cpp)
+
+set_target_properties(${SANDBOX_TARGET} PROPERTIES
+  CXX_STANDARD 17
+  CXX_STANDARD_REQUIRED ON
+)
+
+target_link_libraries(${SANDBOX_TARGET} PRIVATE ${ENGINE_TARGET})

sandbox/src/main.cpp

@@ -0,0 +1,6 @@
+#include <iostream>
+#include "engine/renderer/engine.h"
+
+int main(int argc, char **argv) {
+    return 0;
+}