llama : add support for Chameleon (#8543)

llama : add support for Chameleon (#8543)

* convert chameleon hf to gguf

* add chameleon tokenizer tests

* fix lint

* implement chameleon graph

* add swin norm param

* return qk norm weights and biases to original format

* implement swin norm

* suppress image token output

* rem tabs

* add comment to conversion

* fix ci

* check for k norm separately

* adapt to new lora implementation

* fix layer input for swin norm

* move swin_norm in gguf writer

* add comment regarding special token regex in chameleon pre-tokenizer

* Update src/llama.cpp

Co-authored-by: compilade <redacted>
* fix punctuation regex in chameleon pre-tokenizer (@compilade)

Co-authored-by: compilade <redacted>
* fix lint

* trigger ci

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Co-authored-by: compilade <redacted>