Simplify anything-but

## What is your idea?

The redesign of `ByteMachine` that came in with wildcards can efficiently represent byte-range transitions. Given that, `anything-but` and `anything-but-prefix` can be directly represented in a ByteMachine straightforwardly and efficiently, which would simplify the rule-matching code path.

## Would you be willing to make the change?

Maybe

Start by reading the ByteMachine redesign and locating the current rule-matching paths for `anything-but` and `anything-but-prefix`. Determine how byte-range transitions could represent both operators while preserving existing matching behavior. Done means the operators use the simplified ByteMachine path without changing their semantics.

Written by the indexing model from the issue text.