cp: docs: model support page (1799) into r0.5.0

[chtruong814]

beep boop [🤖]: Hi @terrykong 👋,

we've cherry picked #1799 into  for you! 🚀

Please review and approve this cherry pick by your convenience!

Summary by CodeRabbit

• Documentation
  • Introduced comprehensive model support documentation covering Hugging Face model compatibility, including LLMs and VLMs up to 70B parameters with up to 32k sequence length support, acceleration optimization methods, model examples, and performance benchmarks
  • Updated documentation navigation to include the new model support section

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai]

📝 Walkthrough

Walkthrough

This pull request updates the documentation build infrastructure to use UV (Python package manager) for environment management, replacing OS-specific virtual environment handling. It also introduces a new documentation page detailing model support for Hugging Face models and updates the documentation index accordingly.

Changes

Cohort / File(s)	Summary
Build Infrastructure docs/Makefile	Replaced OS-specific VENV scaffolding with unified UV-based approach via UV_RUN; introduced check-uv validation step; updated docs HTML, publish, and live targets to use uv run for Sphinx commands; removed manual environment activation and cleanup logic.
Documentation Content docs/about/model-support.md	New documentation page covering Hugging Face model support via NeMo AutoModel (LLMs and VLMs up to 70B parameters, 32k sequence length), NeMo Megatron-Bridge acceleration, enumerated model examples, and links to performance benchmarks and YAML recipe configs.
Documentation Index docs/index.md	Added navigation entry for the new about/model-support page in the About section toctree.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• docs: model support page #1799: Introduces identical changes across all three modified files—UV_RUN-based documentation build targets, the same model-support.md documentation page, and matching docs/index.md navigation entry.

Suggested labels

documentation, CI:docs, r0.5.0

Suggested reviewers

• terrykong
• yuki-97

🚥 Pre-merge checks | ✅ 3 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Test Results For Major Changes	⚠️ Warning	PR adds 736 files with 123,805 insertions but description lacks testing information, validation details, and regression checks.	Update PR description with comprehensive test results, unit test pass confirmation, functional test results, integration validation, and performance checks or link to original PR #1799.

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title references a cherry-pick operation (cp:) and mentions the model support page addition, which aligns with the actual changes in the PR that add documentation for model support.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

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