text-splitters[minor]: Added Haskell support in langchain.text_splitter module (#16191)

- **Description:** Haskell language support added in text_splitter
module
  - **Dependencies:** No
  - **Twitter handle:** @nisargtr

If no one reviews your PR within a few days, please @-mention one of
@baskaryan, @eyurtsev, @hwchase17.

---------

Co-authored-by: Bagatur <baskaryan@gmail.com>

docs/docs/modules/data_connection/document_transformers/code_splitter.ipynb

@@ -22,7 +22,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": 4,
    "id": "a9e37aa1",
    "metadata": {},
    "outputs": [],
@@ -35,7 +35,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": 5,
    "id": "e21a2434",
    "metadata": {},
    "outputs": [
@@ -61,10 +61,14 @@
        " 'html',\n",
        " 'sol',\n",
        " 'csharp',\n",
-       " 'cobol']"
+       " 'cobol',\n",
+       " 'c',\n",
+       " 'lua',\n",
+       " 'perl',\n",
+       " 'haskell']"
       ]
      },
-     "execution_count": 2,
+     "execution_count": 5,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -564,13 +568,50 @@
     "c_docs"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "id": "af9de667-230e-4c2a-8c5f-122a28515d97",
+   "metadata": {},
+   "source": [
+    "## Haskell\n",
+    "Here's an example using the Haskell text splitter:"
+   ]
+  },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 3,
    "id": "688185b5",
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "[Document(page_content='main :: IO ()'),\n",
+       " Document(page_content='main = do\\n    putStrLn \"Hello, World!\"\\n-- Some'),\n",
+       " Document(page_content='sample functions\\nadd :: Int -> Int -> Int\\nadd x y'),\n",
+       " Document(page_content='= x + y')]"
+      ]
+     },
+     "execution_count": 3,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "HASKELL_CODE = \"\"\"\n",
+    "main :: IO ()\n",
+    "main = do\n",
+    "    putStrLn \"Hello, World!\"\n",
+    "-- Some sample functions\n",
+    "add :: Int -> Int -> Int\n",
+    "add x y = x + y\n",
+    "\"\"\"\n",
+    "haskell_splitter = RecursiveCharacterTextSplitter.from_language(\n",
+    "    language=Language.HASKELL, chunk_size=50, chunk_overlap=0\n",
+    ")\n",
+    "haskell_docs = haskell_splitter.create_documents([HASKELL_CODE])\n",
+    "haskell_docs"
+   ]
   }
  ],
  "metadata": {