chore: add demo dir to gitignore and local wiki dev scripts

.gitignore

@@ -62,4 +62,5 @@ tests/benchmark/bench-limits-results-mac.jsonl
 .superpowers/
 scripts/setup-cloudflare-email.sh
 apps/videos
-remotion/
+remotion/
+demo

package.json

@@ -21,7 +21,8 @@
   ],
   "packageManager": "pnpm@9.15.4",
   "scripts": {
-    "dev": "turbo dev",
+    "dev": "turbo dev & (cd .local-wiki && npm run docs:dev) &",
+    "wiki:dev": "cd .local-wiki && npm run docs:dev",
     "docs:dev": "pnpm --filter @snapotter/docs docs:dev",
     "build": "turbo build",
     "lint": "turbo lint",