feat(app): Added sidebar navigation and new page routes

- Added Nodes and Settings page routes
- Updated component import paths
- Imported database connection dependencies

src-tauri/src/main.rs

@@ -1,6 +1,14 @@
 // Prevents additional console window on Windows in release, DO NOT REMOVE!!
 #![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
 
+use once_cell::sync::OnceCell;
+use sea_orm::DatabaseConnection;
+
+mod entity;
+
+static DB: OnceCell<DatabaseConnection> = OnceCell::new();
+
+
 fn main() {
     spary_lib::run()
 }