feat(deploy): warn when volume changes will replace machine

[parshnt]

Change Summary

Added warning & confirmation when deploy will replace machines due to volume configuration changes.

Documentation

• In superfly/docs: docs(volumes): note machine replacement when removing mounts docs#2339

[Copilot]

Pull request overview

This PR enhances the deploy command to warn users when volume configuration changes will cause machines to be replaced, requiring explicit confirmation before proceeding. Previously, the system would immediately fail when detecting volume misconfigurations; now it provides a warning with actionable guidance and allows users to confirm their intent.

Changes:

• Removed automatic warning from launchInputForUpdate when mounts section is removed from fly.toml
• Added interactive prompt in validateVolumeConfig to warn users and request confirmation before detaching volumes
• Enhanced validateVolumeConfig to accept context parameter for proper prompt handling

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
internal/command/deploy/machines_launchinput.go	Removed inline warning when mount section is removed, as validation now happens earlier in the flow
internal/command/deploy/machines.go	Added interactive prompt with confirmation when machine has volume but config doesn't specify one, includes proper error handling for non-interactive mode

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