General MSS fixes + tweaks

Add alert message for unpathed skyway routes
Fix overflow during lerp + add Future routes
Add documentation for MSS
Fix potential MSS registration bug
Minor tweaks + styling
Update packet broadcast

src/TableData.hpp

@@ -8,5 +8,6 @@ namespace TableData {
     void cleanup();
 
     int getItemType(int);
+    void loadPaths();
     void constructPath(nlohmann::json::iterator);
 }