docs: fix `tools/sqlite` page (#10258)

The `/docs/integrations/tools/sqlite` page is not about the tool
integrations.
I've moved it into `/docs/use_cases/sql/sqlite`. 
`vercel.json` modified
As a result two pages now under the `/docs/use_cases/sql/` folder. So
the `sql` root page moved down together with `sqlite` page.

docs/docs_skeleton/vercel.json

@@ -1076,6 +1076,10 @@
       "source": "/docs/modules/agents/tools/integrations/zapier",
       "destination": "/docs/integrations/tools/zapier"
     },
+    {
+      "source": "/docs/integrations/tools/sqlite",
+      "destination": "/docs/use_cases/sql/sqlite"
+    },
     {
       "source": "/en/latest/modules/callbacks/filecallbackhandler.html",
       "destination": "/docs/modules/callbacks/how_to/filecallbackhandler"