[feature] Public option to disable cursor-position probing (e.g. ESC[6n])

[kzhrv]

Hi, I’m using reeflective/readline in a shell integration and in PTY-based smoke/integration tests.

One operational issue I’ve hit is that the display engine expects cursor-position responses such as ESC[6n], which is correct in a real terminal but not always available in test harnesses or constrained environments.

Current problem

In a normal interactive terminal this is reasonable, but in:

• PTY smoke harnesses
• minimal terminal emulators
• controlled CI environments

it can block or degrade behavior in ways that are hard to work around externally.

Requested API

A public way to disable or relax cursor-position probing, for example:

type TerminalOptions struct {
    DisableCursorPositionQuery bool
}

func (rl *Shell) SetTerminalOptions(opts TerminalOptions)

Or a narrower option if that fits the current design better.

Why this matters

This would help with:

• deterministic integration testing
• constrained terminal environments
• frontend experimentation without carrying PTY hacks

Desired behavior

If disabled:

• the library should avoid sending cursor-position queries
• and use a documented fallback behavior for rendering/measurement

Even if the degraded rendering is less precise, having a supported fallback would be very valuable.