Scaffold pinned Svelte frontend toolchain

Add a strict TypeScript and Vite workspace with reproducible Node, npm, and dependency versions plus Make targets for checking and building it.

web/package.json

@@ -0,0 +1,25 @@
+{
+  "name": "nuthatch-web",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "packageManager": "[email protected]",
+  "engines": {
+    "node": "24.18.0",
+    "npm": "11.16.0"
+  },
+  "scripts": {
+    "build": "vite build",
+    "check": "svelte-check --tsconfig ./tsconfig.json",
+    "dev": "vite"
+  },
+  "dependencies": {
+    "svelte": "5.56.6"
+  },
+  "devDependencies": {
+    "@sveltejs/vite-plugin-svelte": "7.2.0",
+    "svelte-check": "4.7.3",
+    "typescript": "6.0.3",
+    "vite": "8.1.5"
+  }
+}