Treat ASCII/non-ASCII boundaries as word boundaries in text editing (word deletion, word movement) #5805

For context, I'm Japanese. And I work with Japanese people. So I use Japanese and English in commit messages. (we use English only for proper nouns and technical terms, by the way)

Is your feature request related to a problem? Please describe.

When I write a commit message using Lazygit, ctrl+w deletes consecutive characters regardless of whether they are ASCII or non-ASCII characters.

For example, when the current commit message is 関数名をDoSomethingに変更 (which means rename function name to DoSomething), if I press ctrl+w at the end of the line, all the characters are deleted.

Describe the solution you'd like

ctrl+w only deletes consecutive characters of the same kind (ASCII or non-ASCII).

For example, when the current commit message is 関数名をDoSomethingに変更, if I press ctrl+w at the end of the line, only に変更 is deleted. (ctrl+w deletes only the consecutive non-ASCII characters in this example.)

In addition to this, for consistenc word movement should respect ASCII/non-ASCII boundaries as well.

Describe alternatives you've considered

N/A

Additional context

Many tools I use delete only consecutive characters of the same kind (ASCII or non-ASCII) as the character immediately before the cursor. (e.g. ctrl+w in Vim/Neovim and Claude Code, opt+delete in macOS and Emacs)

For reference, as far as I know these tools delete consecutive characters regardless of whether they are ASCII or non-ASCII characters.

• ctrl+w in zsh
• opt+delete in VSCode

@stefanhaller

I've opened a PR with an implementation.

If this sounds reasonable, I'd appreciate a review of my PR. #5804