feat: Tauri desktop app scaffold

- src-tauri/ with Rust backend, Cargo.toml, main.rs, lib.rs
- tauri.conf.json: Linux deb bundle with webkit2gtk deps
- package.json: added tauri script
- Build on a machine with Rust: cd web && npm run tauri build

web/src-tauri/src/lib.rs

@@ -0,0 +1,16 @@
+#[cfg_attr(mobile, tauri::mobile_entry_point)]
+pub fn run() {
+  tauri::Builder::default()
+    .setup(|app| {
+      if cfg!(debug_assertions) {
+        app.handle().plugin(
+          tauri_plugin_log::Builder::default()
+            .level(log::LevelFilter::Info)
+            .build(),
+        )?;
+      }
+      Ok(())
+    })
+    .run(tauri::generate_context!())
+    .expect("error while running tauri application");
+}

web/src-tauri/src/main.rs

@@ -0,0 +1,6 @@
+// Prevents additional console window on Windows in release, DO NOT REMOVE!!
+#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
+
+fn main() {
+  app_lib::run();
+}