Update AMPLIFY Example

[zachcp]

• Refactor ferritin-amplify structs to their own files
• add tokens.json to the repo and simplify the code
• remove the WASM-incompatible pieces
• update the CLI to take an input and to use the 120M or the 350M models

#  cargo run --example amplify   
cargo run --example amplify --features metal -- --model-id 350M --protein-string \   
MAFSAEDVLKEYDRRRRMEALLLSLYYPNDRKLLDYKEWSPPRVQVECPKAPVEWNNPPSEKGLIVGHFSGIKYKGEKAQASEVDVNKMCCWVSKFKDAMRRYQGIQTCKIPGKVLSDLDAKIKAYNLTVEGVEGFVRYSRVTKQHVAAFLKELRHSKQYENVNLIHYILTDKRVDIQHLEKDLVKDFKALVESAHRMRQGHMINVKYILYQLLKKHGHGPDGPDILTVKTGSKGVLYDDSFRKIYTDLGWKFTPL

target/debug/examples/amplify --model-id 350M --protein-string MAFSAEDVLKEYDRRRRMEALLLSLYYPNDRKLLDYKEWSPPRVQVECPKAPVEWNNPPSEKGLIVGHFSGIKYKGEKAQASEVDVNKMCCWVSKFKDAMRRYQGIQTCKIPGKVLSDLDAKIKAYNLTVEGVEGFVRYSRVTKQHVAAFLKELRHSKQYENVNLIHYILTDKRVDIQHLEKDLVKDFKALVESAHRMRQGHMINVKYILYQLLKKHGHGPDGPDILTVKTGSKGVLYDDSFRKIYTDLGWKFTPL`
Loading the Model and Tokenizer.......
Encoding.......
Predicting.......
Decoding.......
Decoded: Ok("L A L S A E D V L L E Y D R R R R L E A L L L S L Y Y P N D R L L L D Y L E W S P P R V Q V E L P L A P V E W N N P P S E L G L I V G L L S G I L Y L G E L A Q A S E V D V N L L L L W V S L L L D A L R R Y Q G I Q L L L I P G L V L S D L D A L I L A Y N L L V E G V E G L V R Y S R V L L Q L V A A L L L E L R L S R Q Y E N V N L I L Y I L L D L R V D I Q L L E L D L V L D L L A L V E S A L R L R Q G L L I N V R Y I L Y Q L L L R L G L G P D G P D I L L V L L G S L G V L Y D D S L R R I Y L D L G W L L L P L"),