add links to quickstart (#320)

* add links to quickstart

* formatted!

Author: pcoet

site/en/tutorials/quickstart_colab.ipynb

@@ -37,8 +37,34 @@
         "id": "-QhPWE1lwZHH"
       },
       "source": [
-        "# Gemini API Python quickstart\n",
-        "\n",
+        "# Gemini API Python quickstart"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "metadata": {
+        "id": "fa7c47ae6451"
+      },
+      "source": [
+        "<table class=\"tfo-notebook-buttons\" align=\"left\">\n",
+        "  <td>\n",
+        "    <a target=\"_blank\" href=\"https://ai.google.dev/tutorials/quickstart_colab\"><img src=\"https://ai.google.dev/static/site-assets/images/docs/notebook-site-button.png\" height=\"32\" width=\"32\" />View on Google AI</a>\n",
+        "  </td>\n",
+        "  <td>\n",
+        "    <a target=\"_blank\" href=\"https://colab.research.google.com/github/google/generative-ai-docs/blob/main/site/en/tutorials/quickstart_colab.ipynb\"><img src=\"https://www.tensorflow.org/images/colab_logo_32px.png\" />Run in Google Colab</a>\n",
+        "  </td>\n",
+        "  <td>\n",
+        "    <a target=\"_blank\" href=\"https://github.com/google/generative-ai-docs/blob/main/site/en/tutorials/quickstart_colab.ipynb\"><img src=\"https://www.tensorflow.org/images/GitHub-Mark-32px.png\" />View source on GitHub</a>\n",
+        "  </td>\n",
+        "</table>"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "metadata": {
+        "id": "db29b8d4247e"
+      },
+      "source": [
         "This tutorial shows you how to get started with the Gemini API using the Python SDK."
       ]
     },