Update analytics docs for AI traffic features

[taylortran86]

Updated the analytics documentation to reflect the new AI traffic filtering capabilities. Added comprehensive information about the traffic source filter, Top Agents table, MCP Searches metric, and clarified which metrics are available for AI vs human traffic.

Changes

• Enhanced traffic source filter section with detailed explanations of All Traffic, AI, and Human filter options
• Updated Top Agents section with information about AI platforms (Claude, ChatGPT, Perplexity, etc.)
• Expanded MCP Searches section with details about the chart and table views
• Added availability notes to Assistant, Searches, and Feedback sections indicating they're human-traffic only

Generated from feat: add top agents table for AI visitors analytics @densumesh

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Note

Low Risk
Documentation-only updates; low risk aside from potential confusion if product behavior differs from the described metric availability.

Overview
Updates optimize/analytics.mdx to rename and expand the traffic filtering section, explicitly documenting All Traffic / AI / Human options and which analytics metrics appear for each.

Clarifies AI-specific analytics by documenting the Top Agents table (replacing Referrals under AI traffic) and expanding MCP Searches details (chart + query table), and adds/standardizes human-traffic-only notes for Assistant, Searches, and Feedback.

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