refactoring: simplified the validity check of the config before connection

- improved project structure

client/core/api/apiDefs.h

@@ -6,7 +6,7 @@
 namespace apiDefs
 {
     enum ConfigType {
-        AmneziaFreeV2 = 1,
+        AmneziaFreeV2 = 0,
         AmneziaFreeV3,
         AmneziaPremiumV1,
         AmneziaPremiumV2,

client/core/api/apiUtils.cpp

@@ -44,3 +44,8 @@ apiDefs::ConfigType apiUtils::getConfigType(const QJsonObject &serverConfigObjec
     }
     };
 }
+
+apiDefs::ConfigSource apiUtils::getConfigSource(const QJsonObject &serverConfigObject)
+{
+    return static_cast<apiDefs::ConfigSource>(serverConfigObject.value(apiDefs::key::configVersion).toInt());
+}

client/core/api/apiUtils.h

@@ -12,6 +12,7 @@ namespace apiUtils
     bool isSubscriptionExpired(const QString &subscriptionEndDate);
 
     apiDefs::ConfigType getConfigType(const QJsonObject &serverConfigObject);
+    apiDefs::ConfigSource getConfigSource(const QJsonObject &serverConfigObject);
 }
 
 #endif // APIUTILS_H