partners: 🕷️🦜 ScrapeGraph API Integration (#28559)

Hi Langchain team!

I'm the co-founder and mantainer at
[ScrapeGraphAI](https://scrapegraphai.com/).
By following the integration
[guide](https://python.langchain.com/docs/contributing/how_to/integrations/publish/)
on your site, I have created a new lib called
[langchain-scrapegraph](https://github.com/ScrapeGraphAI/langchain-scrapegraph).

With this PR I would like to integrate Scrapegraph as provider in
Langchain, adding the required documentation files.
Let me know if there are some changes to be made to be properly
integrated both in the lib and in the documentation.

Thank you 🕷️🦜

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

---------

Co-authored-by: Erick Friis <erick@langchain.dev>

libs/packages.yml

@@ -68,6 +68,9 @@ packages:
   - name: langchain-qdrant
     repo: langchain-ai/langchain
     path: libs/partners/qdrant
+  - name: langchain-scrapegraph
+    repo: ScrapeGraphAI/langchain-scrapegraph
+    path: .
   - name: langchain-sema4
     repo: langchain-ai/langchain-sema4
     path: libs/sema4