* docs(guides): add "Run Nemotron 3 Ultra free in Hermes Agent" launch guide
Day-0 NVIDIA Nemotron 3 Ultra availability on Nous Portal (free June 4-18,
in partnership with NVIDIA + Nebius). Quick Setup walkthrough for selecting
the nvidia/nemotron-3-ultra:free tier, plus switching/troubleshooting notes.
Registered at the top of Guides & Tutorials.
* docs(guides): reword Nemotron lead-in to match launch copy
Frame as Nemotron Coalition induction (working with NVIDIA) + Nebius
partnership for the free tier, rather than a direct NVIDIA partnership,
to avoid overstating the relationship.
* docs(guides): lead Nemotron guide with desktop app, CLI second
Add a one-click desktop-app install track (download → Nous Portal
recommended sign-in → pick the Free-tier nemotron-3-ultra model) as the
recommended path for non-terminal users, and keep the CLI curl flow as
Option B. Update switching/troubleshooting to cover both surfaces.
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