add Option.

include/Server/Option.h

@@ -0,0 +1,15 @@
+#pragma once
+
+#include <string>
+#include <string_view>
+
+namespace clice {
+
+struct Option {
+    std::string resource_dir;
+    static Option parse(std::string_view execpath, std::string_view filepath);
+};
+
+extern Option option;
+
+}  // namespace clice