Add SSL error handling and user notification dialog

- Implemented a new function `ssl_error_dialog_show` to display SSL connection errors to users in both English and German.
- Integrated SSL error handling in API calls and webhook functionality, ensuring users are informed of potential connection issues.
- Updated relevant files to include the new error handling logic and dialog display.

src/help-dialog.hpp

@@ -9,6 +9,7 @@ void help_dialog_show(const char *local_ip, const char *external_ip,
 
 void update_dialog_show(const char *new_version, const char *locale);
 void forced_update_show(const char *new_version, const char *locale);
+void ssl_error_dialog_show(const char *detail, const char *locale);
 
 #ifdef __cplusplus
 }