[Docs] Model_doc structure/clarity improvements (#26876)

* first batch of structure improvements for model_docs

* second batch of structure improvements for model_docs

* more structure improvements for model_docs

* more structure improvements for model_docs

* structure improvements for cv model_docs

* more structural refactoring

* addressed feedback about image processors

docs/source/en/model_doc/bert-japanese.md

@@ -67,12 +67,16 @@ Example of using a model with Character tokenization:
 >>> outputs = bertjapanese(**inputs)
 ```
 
-Tips:
-
-- This implementation is the same as BERT, except for tokenization method. Refer to the [documentation of BERT](bert) for more usage examples.
-
 This model was contributed by [cl-tohoku](https://huggingface.co/cl-tohoku).
 
+<Tip> 
+
+This implementation is the same as BERT, except for tokenization method. Refer to [BERT documentation](bert) for 
+API reference information.  
+
+</Tip>
+
+
 ## BertJapaneseTokenizer
 
 [[autodoc]] BertJapaneseTokenizer