[update] added new services (scraping, tagging, analytics, sharing) and models (tag, analytics, settings), modularized into Rust backend structure

backend-rust/src/models.rs

@@ -1,3 +1,6 @@
 mod article;
 mod summary;
 mod user;
+mod tag;
+mod analytics;
+mod settings;

backend-rust/src/services.rs

@@ -1,2 +1,6 @@
 mod summary_service;
 mod news_service;
+mod scraping_service;
+mod tagging_service;
+mod analytics_service;
+mod sharing_service;