Add span types documentation page

[laminar-coding-agent]

Summary

• Adds a new dedicated /tracing/structure/span-types page that comprehensively documents each span type (DEFAULT, LLM, TOOL, EXECUTOR)
• Emphasizes that tool call spans should be typed as TOOL for better visibility in the trace view and queryability in the SQL editor
• Covers why typing matters, how to set types via @observe and manual spans, includes a full agent-with-tools example, and shows SQL queries for TOOL spans
• Updates manual-span-creation.mdx to replace the brief inline span types list with a link to the new page
• Adds a "Mark spans as tool calls or LLM calls" entry to the overview quick reference table

Resolves LAM-1408

Test plan

• Verify the new page renders correctly on Mintlify (navigation, tabs, code blocks, tables)
• Confirm the navigation entry appears in the correct position in the sidebar
• Check that links from overview and manual-span-creation correctly point to the new page

🤖 Generated with Claude Code

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Note

Low Risk
Low risk documentation-only change; main risk is broken Mintlify nav/linking or formatting issues in the new page.

Overview
Adds a new tracing/structure/span-types documentation page describing when to use DEFAULT, LLM, TOOL, and EXECUTOR, including examples for setting span type via observe/manual spans and sample SQL queries for TOOL spans.

Updates the sidebar (docs.json) and the Tracing Structure overview/manual-span docs to link to this new guide (replacing the prior brief inline span-type blurb and adding a quick-reference entry).

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