[Docs] Document that we follow the Google editorial style (#36695)

Our documentation style is inconsistent. This hurts readability and perceived quality.

---------

Signed-off-by: Balaji Veeramani <balaji@anyscale.com>

doc/source/ray-contribute/docs.ipynb

@@ -15,6 +15,18 @@
     "\n",
     "This document walks you through everything you need to do to get started.\n",
     "\n",
+    "\n",
+    "## Editorial style\n",
+    "\n",
+    "We follow the [Google developer documentation style guide](https://developers.google.com/style).\n",
+    "Here are some highlights:\n",
+    "\n",
+    "* [Use present tense](https://developers.google.com/style/tense)\n",
+    "* [Use second person](https://developers.google.com/style/person)\n",
+    "* [Use contractions](https://developers.google.com/style/contractions)\n",
+    "* [Use active voice](https://developers.google.com/style/voice)\n",
+    "* [Use sentence case](https://developers.google.com/style/capitalization)\n",
+    "\n",
     "## Building the Ray documentation\n",
     "\n",
     "If you want to contribute to the Ray documentation, you'll need a way to build it.\n",
@@ -168,18 +180,15 @@
     "snippets, read [How to write code snippets](writing-code-snippets).\n"
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": []
-  },
   {
    "cell_type": "code",
    "execution_count": null,
    "id": "ba88d95f",
-   "metadata": {},
+   "metadata": {
+    "vscode": {
+     "languageId": "python"
+    }
+   },
    "outputs": [],
    "source": [
     "# __function_api_start__\n",
@@ -311,7 +320,10 @@
    "metadata": {
     "tags": [
      "hide-cell"
-    ]
+    ],
+    "vscode": {
+     "languageId": "python"
+    }
    },
    "outputs": [],
    "source": [
@@ -373,7 +385,11 @@
    "cell_type": "code",
    "execution_count": null,
    "id": "8412103e",
-   "metadata": {},
+   "metadata": {
+    "vscode": {
+     "languageId": "python"
+    }
+   },
    "outputs": [],
    "source": [
     "num_workers = 8\n",