Add DAQIRI Holoscan integration tutorial

[dleshchev]

Summary

• add a docs-only tutorial for integrating DAQIRI RX bursts with a Holoscan source operator
• add the tutorial to MkDocs navigation and the README tutorial list
• update AGENTS.md documentation structure notes for the new tutorial category

Related Issue

Closes #55

Verification

• python3 -m mkdocs build --strict --site-dir /tmp/daqiri-mkdocs-site-check
• python3 scripts/check_html_links.py /tmp/daqiri-mkdocs-site-check
• git diff --check

Notes

• docs/index.html is intentionally unchanged because it is curated rather than exhaustive.
• python3 scripts/check_doc_refs.py currently fails due unrelated untracked examples/*.yaml files in the local worktree that are missing from the configuration walkthrough decision tree; this branch does not add or modify those files.