Add "Advanced Topics" doc

[jcrist]

Adds a new doc with some advanced topics. Includes:

• CUDA streams and synchronization
• CUDA device selection
• A very small section on configuring RMM. I wanted to mention something, but not provide a full guide. Once the upstream RMM one lands we can link there.

xref #8128

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Enterprise

Run ID: 24af9e01-ad88-4d75-b5e8-12663f02f669

📥 Commits

Reviewing files that changed from the base of the PR and between 729567f and b3600e6.

📒 Files selected for processing (2)

• docs/source/advanced.rst
• docs/source/conf.py

✅ Files skipped from review due to trivial changes (2)

• docs/source/conf.py
• docs/source/advanced.rst

---

📝 Walkthrough

Summary by CodeRabbit

• Documentation

  • Added an "Advanced Topics" doc covering CUDA stream synchronization, GPU device selection, and memory manager configuration with examples and references.
  • Updated the docs table of contents to include the new Advanced Topics page.
  • Added cross-reference links to cuPy, CUDA, and RMM documentation.

• Chores

  • Expanded build artifact ignore patterns for docs outputs.

Walkthrough

Adds a new Advanced Topics Sphinx page on CUDA streams, device selection, and RMM allocator configuration; updates the user guide TOC and intersphinx mappings; and expands .gitignore to exclude additional documentation build artifacts (models, pickles, joblib, ONNX, etc.).

Changes

Advanced Topics Documentation

Layer / File(s)	Summary
Advanced Topics content docs/source/advanced.rst	New Sphinx page covering CUDA stream synchronization (PTDS vs legacy), default CUDA device selection and CUDA_VISIBLE_DEVICES, and RMM memory allocator configuration with code examples and references.
Documentation navigation and build artifacts docs/source/user_guide.rst, docs/source/conf.py, .gitignore	Adds advanced.rst to the user guide TOC; extends intersphinx_mapping with cupy, cuda.core, and rmm; updates .gitignore to ignore *.model, *.pkl, *.tl, *.joblib, and docs/source/**/*.onnx.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

Possibly related issues

• Add advanced-topics docs #8128: Implements the requested "Advanced Topics" documentation page covering CUDA streams, device selection, and RMM configuration.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change—addition of new documentation covering advanced topics (CUDA streams, device selection, RMM configuration).
Description check	✅ Passed	The description is directly related to the changeset, clearly explaining what was added (CUDA streams/synchronization, device selection, RMM configuration section) and linking to the related issue.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@docs/source/advanced.rst`:
- Around line 90-91: The RST named target "Rapids Memory Manager" is declared
without a URL (broken target); replace the bare target ".. _Rapids Memory
Manager:" with a proper external target that includes the RMM docs URL (for
example ".. _Rapids Memory Manager: https://docs.rapids.ai/api/rmm/stable/") or
ensure the referenced label used elsewhere matches an existing target; update
the target declaration so the reference to "Rapids Memory Manager" resolves
cleanly during Sphinx build.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Enterprise

Run ID: aef5908e-f36b-490f-bdf0-4884b2597bd3

📥 Commits

Reviewing files that changed from the base of the PR and between ac61931 and 2622a5b.

📒 Files selected for processing (3)

• .gitignore
• docs/source/advanced.rst
• docs/source/user_guide.rst

[csadorf]

Thanks for the write-up! I have some suggestions for improvement.

[jcrist]

I believe all comments have been addressed.

[jcrist]

/merge