update: improve project structure and add linting/formatting

- Remove duplicate lucide-svelte package, keep @lucide/svelte
- Move schema from src/lib/server/ to src/lib/db/ for better organization
- Add path aliases to svelte.config.js (, , , , )
- Add ESLint and Prettier configuration with 2-space indentation
- Update all imports to use new schema location and icon package

.phase.json

@@ -0,0 +1,8 @@
+{
+  "version": "2",
+  "phaseApp": "wishlist",
+  "appId": "a4d85c7a-8df9-462b-9b91-5cb2957cdcd3",
+  "defaultEnv": "Production",
+  "envId": "496d0105-f2b4-424d-a1a1-a60602fc2252",
+  "monorepoSupport": false
+}