Fix: [Script] Improve ScriptText validation (#11721)

The validation is now done in two steps:
 - First we get the list of parameters in the same order they used to be in encoded string
 - Then we validate the parameter types like FormatString would use them while encoding the string

src/game/game_text.cpp

@@ -268,9 +268,15 @@ static void ExtractStringParams(const StringData &data, StringParamsList &params
 			StringParams &param = params.emplace_back();
 			ParsedCommandStruct pcs = ExtractCommandString(ls->english.c_str(), false);
 
-			for (const CmdStruct *cs : pcs.consuming_commands) {
-				if (cs == nullptr) break;
-				param.emplace_back(GetParamType(cs), cs->consumes);
+			for (auto it = pcs.consuming_commands.begin(); it != pcs.consuming_commands.end(); it++) {
+				if (*it == nullptr) {
+					/* Skip empty param unless a non empty param exist after it. */
+					if (std::all_of(it, pcs.consuming_commands.end(), [](auto cs) { return cs == nullptr; })) break;
+					param.emplace_back(StringParam::UNUSED, 1, nullptr);
+					continue;
+				}
+				const CmdStruct *cs = *it;
+				param.emplace_back(GetParamType(cs), cs->consumes, cs->cmd);
 			}
 		}
 	}