[FEATURE]: Allow optional text qualifier when selecting a Question tool option - UX #17108

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

When using the Question tool, I tend to want to select a predefined option
and provide a short bit of context. Today my only choices are:

1. Pick a canned option (no way to add detail), or
2. "Type your own answer" (have to re-state the option + add my detail)

I've been annoyed by this routinely - building workflows in general on the premise of structured interactions, but a simple case where it's made the workflow feel downright bitter:

I've been cleaning up repos at my org and made a prune PR skill,
The agent asks me to triage a stale PR and I get:

• Decline
• Keep
• Skip for now
• Type your own answer:

I want to decline and note why ("superseded by PR #400"). Right now I
either:

• pick Decline and lose the reason, or
• type Decline, comment: superseded by PR xyz in the free-text box, hoping the
  agent parses it correctly.

I can ofc instruct the agent in the skill to interpret my choose own answer within a set of ways, but that feels indirect and non-deterministic (some instruction e.g. "if supplied is a decline reason, interpret as decline, if it's a question about the PR, enter a discussion"). It doesn't feel smooth to use. I just want to add a bit of context to my choice

Proposing that the key to "add user context" is

1. not enter (I can't tell you the amount of times my stupid mouse cursor has slipped onto a non-insert question option, drawn the focus, and then enter submits it instead of entering the freetext window) - enter != submit when enter also = submit screws me up
2. allowed on any of the answer options to supply additional context.

I looked over these two files to start to understand the current state of the question interaction
packages/opencode/src/cli/cmd/tui/routes/session/question.tsx
packages/opencode/src/question/index.ts
and would be happy to take a crack at a PR for this if it's not outright rejected in concept.

I did search for a while to see if this feature/request existed, I'm a little surprised it doesn't/hasn't been. Sorry if this is due to incompetence rather than reality.