feat: news and notifications page (#1660)

* Add news and notifications

* Add localization for news and notifications

* Remove news caching

* Add fetching news befor openning news page

* Fix not updating news page

* Delete debug output

* Remove news and notificztions with only self-hosted servers

* Add stack filters to fetching news request

* Add fetching news with changing stack in the client

* small refactoring

* polishing

* Rename newsModel files and fix naming in code

* fix: remove custom signals; fetch news only on stack expansion

* chore: delete unnecessary code

* chore: code style fixes

* fix: fixed memory leak in gateway controller

---------

Co-authored-by: vkamn <vk@amnezia.org>

client/settings.h

@@ -236,6 +236,9 @@ public:
     QStringList allowedDnsServers() const;
     void setAllowedDnsServers(const QStringList &servers);
 
+    QStringList readNewsIds() const;
+    void setReadNewsIds(const QStringList &ids);
+
 signals:
     void saveLogsChanged(bool enabled);
     void screenshotsEnabledChanged(bool enabled);
@@ -251,7 +254,7 @@ private:
     mutable SecureQSettings m_settings;
 
     QString m_gatewayEndpoint;
-    bool m_isDevGatewayEnv = false;
+    bool m_isDevGatewayEnv = true;
 };
 
 #endif // SETTINGS_H