feat: Add original-input-empty keybind condition (#3171)

This PR adds a keybind condition called `original-input-empty` that is
true when the TUI was invoked from an empty prompt line; users can use
this to change behavior based on the original prompt's contents; for
example:

```toml
[keymap.emacs]
"esc" = [
  { when = "original-input-empty", action = "return-query" },
  { action = "return-original" }
]
```

Thanks Hazilo in Discord for the suggestion.

0 files changed, 0 insertions, 0 deletions