Move Diagnostics to separate namespace

src/Script.cpp

@@ -25,7 +25,7 @@ Porygon::Script *Porygon::Script::Create(const string &script) {
 }
 
 Porygon::Script::Script() {
-    Diagnostics = new DiagnosticsHolder();
+    Diagnostics = new Diagnostics::DiagnosticsHolder();
     _boundScript = nullptr;
     _scriptVariables = new unordered_map<uint32_t, shared_ptr<EvalValue>>(0);
     _evaluator = new Evaluator(this -> _scriptVariables);