Add LLaVA support (#2234)

* first commit

* llava

* clippy and fmt

* some fixes

* minor fixes

* remove useless file

* refactor: Remove llava/constants.rs and update llava/mod.rs

* modify variable name

* modify code after clippy

* Minor tweaks.

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Co-authored-by: laurent <laurent.mazare@gmail.com>

candle-transformers/src/models/mod.rs

@@ -17,6 +17,7 @@ pub mod jina_bert;
 pub mod llama;
 pub mod llama2_c;
 pub mod llama2_c_weights;
+pub mod llava;
 pub mod mamba;
 pub mod marian;
 pub mod metavoice;