Add cmake install commands

CMakeLists.txt

@@ -19,6 +19,7 @@ endif()
 
 set(NOVA_SANITIZERS "" CACHE STRING "Sanitizers to enable (address, undefined, leak)")
 set(NOVA_WERROR OFF CACHE BOOL "Treat compiler warnings as errors")
+set(NOVA_ENABLE_INSTALL ON CACHE BOOL "Enable installation targets")
 
 add_compile_definitions(
 	NOVA_VERSION_MAJOR=${PROJECT_VERSION_MAJOR}
@@ -87,5 +88,10 @@ else()
 	message(FATAL_ERROR "Unsupported platform")
 endif()
 
+if (NOVA_ENABLE_INSTALL)
+	include(CMakePackageConfigHelpers)
+	include(GNUInstallDirs)
+endif()
+
 add_subdirectory(engine)
 add_subdirectory(editor)