feat: refactor web server to be generic and add websockets framework (#1786)

* Break out changes into a smaller subset

* NL@EOF

* fix windows bs
add player ws updates
add websocket docs

* tested everything to make sure it works

* Address Feedback

dCommon/JSONUtils.h

@@ -0,0 +1,11 @@
+#ifndef _JSONUTILS_H_
+#define _JSONUTILS_H_
+
+#include "json_fwd.hpp"
+
+namespace JSONUtils {
+	// check required fields in json data
+	std::string CheckRequiredData(const nlohmann::json& data, const std::vector<std::string>& requiredData);
+}
+
+#endif // _JSONUTILS_H_