Switch from `tox` to `poethepoet`

[redeboer]

So far, we have been using tox in a way that it is not really designed for, defining tasks through environments (-e flag). It seems that Poe the Pet is a better alternative that also integrates better with uv.

Tasks

• Check overview of tasks with poe
• Check for "tox" in source code
• Check for "conda" in source code

Implementation

• ENH: switch to poethepoet as task runner actions#143
• ENH: switch to poethepoet as task runner #525

Related PRs

• Update task runner developer instructions
• DX: switch to poe as task runner ampform#473
• DX: switch to poe as task runner ampform-dpd#167
• https://github.com/ComPWA/benchmarks/pull/29
• DX: switch to poe as task runner compwa.github.io#306
• DX: switch to poe as task runner demo#44
• DX: switch to poe as task runner gluex-nstar#112
• DX: switch to poe as task runner jax-mini-benchmark#15
• https://github.com/ComPWA/K-matrix-research/pull/104
• https://github.com/ComPWA/Nstar-docs/pull/31
• DX: switch to poe as task runner PWA-pages#234
• https://github.com/ComPWA/PWA-JPsi2pbarSigmaKS/pull/229
• DX: switch to poe as task runner qrules#320
• https://github.com/ComPWA/RUB-NB2-169/pull/50
• DX: switch to poe as task runner sphinx-hep-pdgref#46
• DX: switch to poe as task runner strong2020-salamanca#47
• DX: switch to poe as task runner tensorwaves#544
• DX: use poe as task runner sphinx-api-relink#35
• DX: use poe as task runner sphinx-pybtex-etal-style#14

PRs that replace tox with Pixi

• DX: switch to Pixi as task runner gluex-amplitude#40
• DX: switch to Pixi as task runner polarimetry#397
• DX: switch to Pixi as task runner report#31