Add a `conda` install option for `trustllm`

[sugatoray]

A conda installation option could be very helpful. I have already started working on this, to add trustllm to conda-forge channel.

Conda-forge PR:

• https://github.com/conda-forge/staged-recipes/pull/25031

Once the conda-forge PR is merged, you will be able to install the library with conda as follows:

conda install -c conda-forge trustllm

:bulb: I will push a PR to update the docs once the package is available on conda-forge.

[sugatoray]

cc: @HowieHwong

[sugatoray]

The PR got merged. trustllm is now available on conda-forge.

This is the recipe maintaining feedstock: https://github.com/conda-forge/trustllm-feedstock

cc: @HowieHwong