Migrate from window.electron to tauri IPC functions across components

- Replaced `window.electron.invoke` calls with equivalent `tauri` function calls for all IPC interactions.
- Removed `electron.d.ts` TypeScript definitions as they are no longer needed.
- Updated related logic for offline/online state synchronization.
- Added `types.rs` and `shared/mod.rs` modules to support Tauri IPC integration with Rust enums and shared logic.
- Refactored IPC request queues to use updated handler names for consistency with Tauri.

components/UserMenu.tsx

@@ -3,6 +3,7 @@ import {SessionContext} from "@/context/SessionContext";
 import NoPicture from "@/components/NoPicture";
 import System from "@/lib/models/System";
 import {useTranslations} from "next-intl";
+import * as tauri from '@/lib/tauri';
 
 export default function UserMenu() {
     const {session} = useContext(SessionContext);
@@ -34,8 +35,8 @@ export default function UserMenu() {
     
     async function handleLogout(): Promise<void> {
         System.removeCookie("token");
-        await window.electron.removeToken();
-        window.electron.logout();
+        await tauri.removeToken();
+        tauri.logout();
     }
 
     return (