docs: remove moved Sweeper integration guide

[jasonqinzhou]

Summary

• remove the Dynamo Fern copy of the Sweeper integration guide after it moves to AISimulate
• remove the page from Fern navigation and the Dynamo-owned-document integrity set
• redirect the former dev-docs URL to the canonical AISimulate guide
• update Dynamo's compatibility copy of the Sweeper examples to use the canonical cross-repository URL

Why

The guide is part of AISimulate's Sweeper documentation and is now maintained with the standalone package in ai-dynamo/aisimulate#6. Keeping a second manually maintained copy in Dynamo would recreate the ownership and link drift exposed by AISimulate PR #3.

Dependency

Merge after ai-dynamo/aisimulate#6 so the external redirect target exists on ai-dynamo/aisimulate@main.

Impact

Documentation only. The old Dynamo dev-docs URL remains usable through a permanent redirect.

Validation

• targeted pre-commit suite passed, including YAML, docs sync integrity, asset paths, style, codespell, Ruff, and whitespace checks
• exact GitHub Actions Markdown-link checker: 0 broken links across 580 files; 4 pre-existing suspicious-symlink warnings remain non-failing
• python3 docs/fern/scripts/sync_aisimulate_docs.py --check
• Ruby/Psych parse of docs/fern/index.yml and docs/fern/docs.yml
• git diff --check

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[jasonqinzhou]

Superseded by #13473. The replacement uses a branch directly in ai-dynamo/dynamo so repository maintainers can update the PR collaboratively, and it is rebased onto the current upstream main.