Rename imag to haar to keep consistency with the paper.

[hzhangxyz]

Description

Checklist:

• I have read the CONTRIBUTING.md.

[Copilot]

Pull Request Overview

This PR renames the imag subcommand to haar for consistency with the underlying paper. The change maintains backward compatibility by keeping the old imag functionality accessible while deprecating it.

Key changes:

• Renamed ImaginaryConfig class to HaarConfig and updated all references
• Added backward compatibility through a deprecated ImagConfig class that inherits from HaarConfig
• Updated data structure keys and logging metrics from "imag" to "haar"

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
qmb/haar.py	Renamed main config class, updated all data keys and logging references, added backward compatibility
qmb/main.py	Updated import statement from imag to haar

Comments suppressed due to low confidence (1)

qmb/haar.py:528

• The class name ImagConfig is inconsistent with the naming pattern. It should be ImaginaryConfig to match the original class name that was renamed to HaarConfig.

class ImagConfig(HaarConfig):