model : Add support for Arcee AI's upcoming AFM model (#14185) * Add Arcee AFM support * Add draft update code * Fix linter and update URL, may still not be final * Update src/llama-model.cpp Co-authored-by: Xuan-Son Nguyen <[email protected]> * Remote accidental blank line --------- Co-authored-by: Xuan-Son Nguyen <[email protected]>