Add SolidJS + Vite PWA client scaffold

Base Vite/SolidJS project setup for the client app: build config,
static assets, and global styles.

client/package.json

@@ -0,0 +1,26 @@
+{
+  "name": "tiptoi-sync-client",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc -b && vite build",
+    "preview": "vite preview",
+    "cap:sync": "cap sync",
+    "cap:android": "cap run android"
+  },
+  "dependencies": {
+    "@capacitor/android": "^7.0.0",
+    "@capacitor/core": "^7.0.0",
+    "@capacitor/preferences": "^7",
+    "solid-js": "^1.9.13"
+  },
+  "devDependencies": {
+    "@capacitor/cli": "^7.0.0",
+    "@types/node": "^24.13.2",
+    "typescript": "~6.0.2",
+    "vite": "^8.1.1",
+    "vite-plugin-solid": "^2.11.12"
+  }
+}