## Background
HuggingFace repositories store tokenizers in two flavours:
1. "slow tokenizer" - corresponds to a tokenizer implemented in Python
and stored as `tokenizer_config.json`
2. "fast tokenizers" - corresponds to a tokenizer implemented in Rust
and stored as `tokenizer.json`
Many repositories only include files for 1., but the `transformers` library
automatically converts "slow tokenizer" to "fast tokenizer" whenever possible.
Bumblebee relies on the Rust bindings and therefore always requires the
`tokenizer.json` file. This app generates that file for any repository with the
"slow tokenizer".