docs(examples): add codesandbox configuration

Author: darrachequesne

examples/connection-state-recovery-example/cjs/.codesandbox/Dockerfile

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+FROM node:20-bullseye

examples/connection-state-recovery-example/cjs/.codesandbox/tasks.json

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+{
+  // These tasks will run in order when initializing your CodeSandbox project.
+  "setupTasks": [
+    {
+      "name": "Install Dependencies",
+      "command": "npm install"
+    }
+  ],
+
+  // These tasks can be run from CodeSandbox. Running one will open a log in the app.
+  "tasks": {
+    "npm start": {
+      "name": "npm start",
+      "command": "npm start",
+      "runAtStart": true
+    }
+  }
+}

examples/connection-state-recovery-example/esm/.codesandbox/Dockerfile

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+FROM node:20-bullseye

examples/connection-state-recovery-example/esm/.codesandbox/tasks.json

@@ -0,0 +1,18 @@
+{
+  // These tasks will run in order when initializing your CodeSandbox project.
+  "setupTasks": [
+    {
+      "name": "Install Dependencies",
+      "command": "npm install"
+    }
+  ],
+
+  // These tasks can be run from CodeSandbox. Running one will open a log in the app.
+  "tasks": {
+    "npm start": {
+      "name": "npm start",
+      "command": "npm start",
+      "runAtStart": true
+    }
+  }
+}