chore(demos): added svelte default demo

demos/package.json

@@ -11,15 +11,16 @@
     "@hocuspocus/provider": "^1.0.0-alpha.29",
     "d3": "^7.3.0",
     "fast-glob": "^3.2.11",
+    "lowlight": "^1.20.0",
     "remixicon": "^2.5.0",
     "shiki": "^0.10.0",
     "simplify-js": "^1.2.4",
-    "y-webrtc": "10.2.2",
-    "yjs": "13.5.26",
     "y-prosemirror": "1.0.20",
-    "lowlight": "^1.20.0"
+    "y-webrtc": "10.2.2",
+    "yjs": "13.5.26"
   },
   "devDependencies": {
+    "@sveltejs/vite-plugin-svelte": "^1.0.0-next.49",
     "@types/uuid": "^8.3.4",
     "@vitejs/plugin-react": "^1.3.1",
     "@vitejs/plugin-vue": "^1.10.2",
@@ -29,6 +30,7 @@
     "react": "^18.0.0",
     "react-dom": "^18.0.0",
     "sass": "^1.49.7",
+    "svelte": "^3.48.0",
     "tailwindcss": "^2.2.19",
     "typescript": "^4.5.5",
     "uuid": "^8.3.2",