Merge conda environment.yml files (#30)

* Merge zarr-gpu-env.yaml into environment.yml

Consolidate two conda specification files into one environment.yml file. Notable changes are:
- Staying on Python 3.11 instead of Python 3.12
- Drop torchvision/torchaudio as not used in this repo
- Using `nvidia-dali-python` from conda-forge instead of `nvidia-dali-cuda120` from PyPI
- Using nightly `kvikIO=25.04.00a` instead of https://github.com/TomAugspurger/kvikio-zarr-v3
- Using `xarray>=2025.3.0` containing pydata/xarray#10078

* Bump python from 3.11 to 3.12

* Add dask-jobqueue from rechunking/environment.yml

Author: weiji14