Installer: clarify selection prompt

[ppawlowski]

Description

During installation, the user is presented with a numbered choice. However, instead of asking the user to select one of the options, the installer follows up with a yes/no question specifically about option 2.

  1. Install the device agent only (you'll need to configure it manually later)
  2. Provide a device configuration file now
Do you want to provide a device agent configuration now? (Y/n)

This creates confusion and feels unintuitive.

The goal of this task is to clarify this step and either update the output and align it with a yes/no prompt or add an option selector.

Follow up for #476 (comment)

Epic/Story

No response