updating installer

i updated all installers to use tasks instead of services, made the uninstaller to work, and overworked the whole installing process

src/client_backend/update.h

@@ -3,7 +3,7 @@
 #define UPDATE_H
 #include <curl/curl.h>
 #include<string>
-int update_db(const std::string& folder_path);
+int update_db(const char* folder_path);
 int update_settings(const char*settings_type);
 int action_update_settings();
 #endif