Restructure source and resource files (#46)

importantly, res is now res/res and css is now res/css

src/discord/ban.cpp

@@ -0,0 +1,6 @@
+#include "ban.hpp"
+
+void from_json(const nlohmann::json &j, BanData &m) {
+    JS_N("reason", m.Reason);
+    JS_D("user", m.User);
+}