PEA tutorial

[natestemen]

Tutorial demonstrating the use and workflow of PEA.

[Sai-Vignesh]

Hi, I’d like to work on this. Plan: add a MyST example at docs/source/examples/pea-intro.md, mirroring the ZNE tutorial (problem setup → one-liner → options → two-stage), with a small plot + thumbnail. I’ll submit a draft PR for 0.49.0.

[natestemen]

@Sai-Vignesh is this still something you're working on or would like to work on?