Document how to use conda-eda

[xobs]

I was under the impression that conda-eda was usable from within conda, however it doesn't work, and there doesn't appear to be any documentation on how to use conda-eda under https://hdl.github.io/conda-eda/Usage.html

(base) user@Ondo:/si$ conda config --env --add channels conda-eda
(base) user@Ondo:/si$ conda upgrade -c conda-eda --all
Collecting package metadata (current_repodata.json): failed

UnavailableInvalidChannel: HTTP 404 NOT FOUND for channel conda-eda <https://conda.anaconda.org/conda-eda>

The channel is not accessible or is invalid.

You will need to adjust your conda configuration to proceed.
Use `conda config --show channels` to view your configuration's current state,
and use `conda config --show-sources` to view config file locations.


(base) user@Ondo:/si$

Please add documentation on how to use this repository as a user, rather than as someone building packages.

[umarcor]

I think the channel is litex-hub due to historic reasons: https://github.com/search?q=repo%3Ahdl%2Fconda-eda%20litex-hub&type=code.

[xobs]

That would explain some of the confusion I had.

I think it make sense to add that to the Usage.html guide, in addition to the README.md, so users can know how to use the packages built as part of this repo.

[umarcor]

Refs:

• Error while installing skywater PDK during make install step  RTimothyEdwards/open_pdks#376
• environment: update channel google/skywater-pdk#421

/cc @proppy