docs: add agent quickstart files for all SDK languages

[ericciarla]

Summary

• Adds canonical agent quickstart docs for Node.js, Python, Rust, Java, and Elixir in agent-quickstart/
• Each file covers search, scrape, and interact with every confirmed SDK parameter, short descriptions, and realistic examples
• Generated from SDK source code and the OpenAPI spec (v2-openapi.json), not from existing docs
• Adds an "Agent Quickstarts" navigation group to the "Build with AI" tab in docs.json

What each file includes

• Install command and auth pattern
• "When to use what" decision guide (search vs scrape vs interact)
• For each endpoint: why to use it, preferred SDK method name, working example, and a full parameter table
• Language-specific notes (naming conventions, deprecated aliases, SDK quirks)
• Source of truth references

Language-specific highlights

• Node.js / Python / Rust: Document both code and prompt for interact
• Java / Elixir: Document that interact only supports code (no prompt)
• Elixir: Uses OpenAPI-generated function names (search_and_scrape, scrape_and_extract_from_url, interact_with_scrape_browser_session)
• Rust: Documents struct literal construction with ..Default::default()
• Java: Documents builder pattern and CompletableFuture async variants

Test plan

• Verify each .mdx file renders cleanly in Mintlify
• Confirm the "Agent Quickstarts" group appears in the "Build with AI" tab navigation
• Spot-check parameter tables against SDK source for accuracy

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Generated by Claude Code

[mintlify]

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Project	Status	Preview	Updated (UTC)
firecrawl	🟢 Ready	View Preview	Aug 19, 2026, 1:29 PM

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