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.cpp

@@ -0,0 +1,17 @@
+#include "JSONUtils.h"
+#include "json.hpp"
+
+using json = nlohmann::json;
+
+std::string JSONUtils::CheckRequiredData(const json& data, const std::vector<std::string>& requiredData) {
+	json check;
+	check["error"] = json::array();
+	for (const auto& required : requiredData) {
+		if (!data.contains(required)) {
+			check["error"].push_back("Missing Parameter: " + required);
+		} else if (data[required] == "") {
+			check["error"].push_back("Empty Parameter: " + required);
+		}
+	}
+	return check["error"].empty() ? "" : check.dump();
+}