[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/mt5.md

@@ -60,7 +60,7 @@ Google has released the following variants:
 This model was contributed by [patrickvonplaten](https://huggingface.co/patrickvonplaten). The original code can be
 found [here](https://github.com/google-research/multilingual-t5).
 
-## Documentation resources
+## Resources
 
 - [Translation task guide](../tasks/translation)
 - [Summarization task guide](../tasks/summarization)
@@ -82,6 +82,8 @@ See [`T5Tokenizer`] for all details.
 
 See [`T5TokenizerFast`] for all details.
 
+<frameworkcontent>
+<pt>
 
 ## MT5Model
 
@@ -103,6 +105,9 @@ See [`T5TokenizerFast`] for all details.
 
 [[autodoc]] MT5ForQuestionAnswering
 
+</pt>
+<tf>
+
 ## TFMT5Model
 
 [[autodoc]] TFMT5Model
@@ -115,6 +120,9 @@ See [`T5TokenizerFast`] for all details.
 
 [[autodoc]] TFMT5EncoderModel
 
+</tf>
+<jax>
+
 ## FlaxMT5Model
 
 [[autodoc]] FlaxMT5Model
@@ -126,3 +134,6 @@ See [`T5TokenizerFast`] for all details.
 ## FlaxMT5EncoderModel
 
 [[autodoc]] FlaxMT5EncoderModel
+
+</jax>
+</frameworkcontent>