geckos-survey/ngist ? reverse-engineered prompt

Build me a Python pipeline for analyzing galaxy integral field spectroscopy data, especially MUSE data, but usable for modern IFS datasets too.

I want it to take in reduced spectral cubes, run the main science steps, and produce easy to inspect FITS maps and best fit spectra. It should extract stellar kinematics, make continuum only and line only cubes, run emission line analysis, estimate star formation histories, and measure stellar population properties from both full spectral fitting and absorption line strength indices. Include a quick look map viewer so I can inspect the results as the pipeline runs.

Please make it feel like a polished, actively maintained successor to the older GIST workflow, with clear installation and configuration, sensible defaults, and room for advanced users to tweak things. If you need to check current docs or best practices while building it, look them up online.