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/tauri.conf.json

@@ -0,0 +1,45 @@
+{
+  "$schema": "../node_modules/@tauri-apps/cli/config.schema.json",
+  "productName": "dumpsterChat",
+  "version": "0.1.0",
+  "identifier": "coffee.dustin.dumpsterchat",
+  "build": {
+    "frontendDist": "../dist",
+    "devUrl": "http://localhost:5173",
+    "beforeDevCommand": "npm run dev",
+    "beforeBuildCommand": "npm run build"
+  },
+  "app": {
+    "windows": [
+      {
+        "title": "dumpsterChat",
+        "width": 1100,
+        "height": 750,
+        "minWidth": 680,
+        "minHeight": 480,
+        "resizable": true,
+        "fullscreen": false,
+        "center": true
+      }
+    ],
+    "security": {
+      "csp": null
+    }
+  },
+  "bundle": {
+    "active": true,
+    "targets": "all",
+    "icon": [
+      "icons/32x32.png",
+      "icons/128x128.png",
+      "icons/128x128@2x.png",
+      "icons/icon.icns",
+      "icons/icon.ico"
+    ],
+    "linux": {
+      "deb": {
+        "depends": ["libwebkit2gtk-4.1-0", "libgtk-3-0", "libappindicator3-1"]
+      }
+    }
+  }
+}