Add project files.

ModulithEngine/CMakeLists.txt

@@ -0,0 +1,14 @@
+add_library(ModulithEngine STATIC)
+
+target_sources(ModulithEngine
+    PRIVATE
+        src/Engine.cpp
+        # add more cpp files here
+)
+
+target_include_directories(ModulithEngine
+    PUBLIC
+        ${CMAKE_CURRENT_SOURCE_DIR}/include
+)
+
+target_compile_features(ModulithEngine PUBLIC cxx_std_20)