community[minor]: Add support for Pebblo cloud_api_key in PebbloSafeLoader (#19855)

**Description**:
_PebbloSafeLoader_: Add support for pebblo's cloud api-key in
PebbloSafeLoader

- This Pull request enables PebbloSafeLoader to accept pebblo's cloud
api-key and send the semantic classification data to pebblo cloud.

**Documentation**: Updated 
**Unit test**: Added
**Issue**: NA
**Dependencies**: - None
**Twitter handle**: @rahul_tripathi2

Signed-off-by: Rahul Tripathi <rauhl.psit.ec@gmail.com>
Co-authored-by: Rahul Tripathi <rauhl.psit.ec@gmail.com>

docs/docs/integrations/document_loaders/pebblo.ipynb

@@ -62,6 +62,35 @@
     "documents = loader.load()\n",
     "print(documents)"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Send semantic topics and identities to Pebblo cloud server\n",
+    "\n",
+    "To send semantic data to pebblo-cloud, pass api-key to PebbloSafeLoader as an argument or alternatively, put the api-ket in `PEBBLO_API_KEY` environment variable."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from langchain.document_loaders.csv_loader import CSVLoader\n",
+    "from langchain_community.document_loaders import PebbloSafeLoader\n",
+    "\n",
+    "loader = PebbloSafeLoader(\n",
+    "    CSVLoader(\"data/corp_sens_data.csv\"),\n",
+    "    name=\"acme-corp-rag-1\",  # App name (Mandatory)\n",
+    "    owner=\"Joe Smith\",  # Owner (Optional)\n",
+    "    description=\"Support productivity RAG application\",  # Description (Optional)\n",
+    "    api_key=\"my-api-key\",  # API key (Optional, can be set in the environment variable PEBBLO_API_KEY)\n",
+    ")\n",
+    "documents = loader.load()\n",
+    "print(documents)"
+   ]
   }
  ],
  "metadata": {