chore: update CodeSandbox links and add a config (#5624)

* chore: update CodeSandbox links and add a config

* Update tasks.json

.codesandbox/tasks.json

@@ -0,0 +1,43 @@
+{
+  // These tasks will run in order when initializing your CodeSandbox project.
+  "setupTasks": [
+    {
+      "name": "Install Dependencies",
+      "command": "yarn install"
+    }
+  ],
+
+  // These tasks can be run from CodeSandbox. Running one will open a log in the app.
+  "tasks": {
+    "build": {
+      "name": "Build",
+      "command": "yarn build",
+      "runAtStart": false
+    },
+    "fix": {
+      "name": "Fix",
+      "command": "yarn fix",
+      "runAtStart": false
+    },
+    "prettier": {
+      "name": "Prettify",
+      "command": "yarn prettier",
+      "runAtStart": false
+    },
+    "start": {
+      "name": "Start Excalidraw",
+      "command": "yarn start",
+      "runAtStart": true
+    },
+    "test": {
+      "name": "Run Tests",
+      "command": "yarn test",
+      "runAtStart": false
+    },
+    "install-deps": {
+      "name": "Install Dependencies",
+      "command": "yarn install",
+      "restartOn": { "files": ["yarn.lock"] }
+    }
+  }
+}

README.md

@@ -88,7 +88,7 @@ Try out [`@excalidraw/excalidraw`](https://www.npmjs.com/package/@excalidraw/exc
 
 ### Code Sandbox
 
-- Go to https://codesandbox.io/s/github/excalidraw/excalidraw
+- Go to https://codesandbox.io/p/github/excalidraw/excalidraw
   - You may need to sign in with GitHub and reload the page
 - You can start coding instantly, and even send PRs from there!