docs: Added WatsonxRerank documentation (#27424)

Thank you for contributing to LangChain!

Changes:
- docs: Added `WatsonxRerank` documentation 
- docs Updated `WatsonxEmbeddings` with docs template
- docs: Updated `ChatWatsonx` with docs template
- docs: Updated `WatsonxLLM` with docs template
- docs: Added `ChatWatsonx` to list with Chat models providers. Added
[test_chat_models_standard](https://github.com/langchain-ai/langchain-ibm/blob/main/libs/ibm/tests/integration_tests/test_chat_models_standard.py)
to `langchain_ibm` tests suite.
- docs: Added `IBM` to list with Embedding models providers. Added
[test_embeddings_standard](https://github.com/langchain-ai/langchain-ibm/blob/main/libs/ibm/tests/integration_tests/test_embeddings_standard.py)
to `langchain_ibm` tests suite.
- docs: Updated `langcahin_ibm` recommended versions compatible with
`LangChain v0.3`

---------

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

docs/src/theme/FeatureTables.js

@@ -215,7 +215,18 @@ const FEATURE_TABLES = {
                 "multimodal": false,
                 "local": false,
                 "apiLink": "https://python.langchain.com/api_reference/upstage/chat_models/langchain_databricks.chat_models.ChatDatabricks.html"
-            }
+            },
+            {
+                "name": "ChatWatsonx",
+                "package": "langchain-ibm",
+                "link": "ibm_watsonx",
+                "structured_output": true,
+                "tool_calling": true,
+                "json_mode": true, 
+                "multimodal": false,
+                "local": false,
+                "apiLink": "https://python.langchain.com/api_reference/ibm/chat_models/langchain_ibm.chat_models.ChatWatsonx.html"
+            },
         ],
     },
     llms: {
@@ -370,6 +381,12 @@ const FEATURE_TABLES = {
                 package: "langchain-voyageai",
                 apiLink: "https://python.langchain.com/api_reference/voyageai/embeddings/langchain_voyageai.embeddings.VoyageAIEmbeddings.html"
             },
+            {
+                name: "IBM",
+                link: "ibm_watsonx",
+                package: "langchain-ibm",
+                apiLink: "https://python.langchain.com/api_reference/ibm/embeddings/langchain_ibm.embeddings.WatsonxEmbeddings.html"
+            },
         ]
     },
     document_retrievers: {