fix(ai): restore url-quote-magic for ? in zsh (#3304)

I discovered that since #3178, typing or pasting a `?` in a URL no
longer gets escaped by `url-quote-magic`. For example, pasting
`https://example.com/search?q=foo&test` would result in
`https://example.com/search?q=foo\&test` (leave the `?` unescaped, while
`&` still worked correctly).

The root cause is that Atuin binds `?` to `_atuin_ai_question_mark`,
which bypasses `url-quote-magic` in two ways:

1. **Typed `?`**: the else branch (non-empty buffer) appended `?`
directly to `LBUFFER` instead of delegating to `self-insert` which runs
`url-quote-magic`.

2. **Pasted `?`**: `bracketed-paste-magic` only [activates widgets whose
name matches
`self-*`](https://github.com/zsh-users/zsh/blob/99f578897614f318cdad76402a7d2423ce176b5a/Functions/Zle/bracketed-paste-magic#L24).
Since `_atuin_ai_question_mark` didn't match, pasted `?` characters fell
through to `zle .self-insert` — the raw built-in that inserts literally
without any URL escaping.

The fix renames the widget to `self-atuin-ai-question-mark` (Note: I am
not sure this is the best way but it is a relatively simple one). The
`self-` prefix satisfies `bracketed-paste-magic`'s `active-widgets`
pattern, so `?` in paste is processed by our widget and delegated to
`zle self-insert`, restoring `url-quote-magic` behaviour. The typed case
delegates to `zle self-insert` in the else branch for the same reason.

0 files changed, 0 insertions, 0 deletions