community[minor]: jina search tools integrating (jina reader) (#23339)

- **PR title**: "community: add Jina Search tool"
- **Description:** Added the Jina Search tool for querying the Jina
search API. This includes the implementation of the JinaSearchAPIWrapper
and the JinaSearch tool, along with a Jupyter notebook example
demonstrating its usage.
- **Issue:** N/A
- **Dependencies:** N/A
- **Twitter handle:** [Twitter
handle](https://x.com/yashp3020?t=7wM0gQ7XjGciFoh9xaBtqA&s=09)


- [x] **Add tests and docs**: If you're adding a new integration, please
include
1. an example notebook showing its use. It lives in
`docs/docs/integrations` directory.

- [ ] **Lint and test**: Run `make format`, `make lint` and `make test`
from the root of the package(s) you've modified. See contribution
guidelines for more: https://python.langchain.com/docs/contributing/

---------

Co-authored-by: Bagatur <baskaryan@gmail.com>
Co-authored-by: Chester Curme <chester.curme@gmail.com>

libs/community/langchain_community/utilities/jina_search.py

@@ -0,0 +1,68 @@
+import json
+from typing import List
+
+import requests
+from langchain_core.documents import Document
+from langchain_core.pydantic_v1 import BaseModel
+from yarl import URL
+
+
+class JinaSearchAPIWrapper(BaseModel):
+    """Wrapper around the Jina search engine."""
+
+    base_url: str = "https://s.jina.ai/"
+    """The base URL for the Jina search engine."""
+
+    def run(self, query: str) -> str:
+        """Query the Jina search engine and return the results as a JSON string.
+
+        Args:
+            query: The query to search for.
+
+        Returns: The results as a JSON string.
+
+        """
+        web_search_results = self._search_request(query=query)
+        final_results = [
+            {
+                "title": item.get("title"),
+                "link": item.get("url"),
+                "snippet": item.get("description"),
+                "content": item.get("content"),
+            }
+            for item in web_search_results
+        ]
+        return json.dumps(final_results)
+
+    def download_documents(self, query: str) -> List[Document]:
+        """Query the Jina search engine and return the results as a list of Documents.
+
+        Args:
+            query: The query to search for.
+
+        Returns: The results as a list of Documents.
+
+        """
+        results = self._search_request(query)
+        return [
+            Document(
+                page_content=item.get("content"),  # type: ignore[arg-type]
+                metadata={
+                    "title": item.get("title"),
+                    "link": item.get("url"),
+                    "description": item.get("description"),
+                },
+            )
+            for item in results
+        ]
+
+    def _search_request(self, query: str) -> List[dict]:
+        headers = {
+            "Accept": "application/json",
+        }
+        url = str(URL(self.base_url + query))
+        response = requests.get(url, headers=headers)
+        if not response.ok:
+            raise Exception(f"HTTP error {response.status_code}")
+
+        return response.json().get("data", [])