docs: add Research API to README summary

[tyler5673]

Summary

• Adds Research API to the feature list in the README summary section

Note: this section is speakeasy-generated and will be overwritten on the next regen. The OpenAPI spec description should be updated to include Research API so it persists.

[claude]

This line is inside the `` Speakeasy-generated block and will be overwritten on the next SDK regeneration (e.g., next time the generate-sdk workflow runs against the upstream specs).

The persistent fix is to update the info.description in one of the upstream OpenAPI source specs (listed in .speakeasy/workflow.yaml) — likely openapi_base.yaml — to include the Research API bullet, or to add an overlay action in overlays/python_overlay.yaml:

- target: $["info"]["description"]
  update: "Unified API for Express, Advanced, and Custom Agents from You.com\nGet the best search results from web and news sources\nReturns the HTML or Markdown of a target webpage\nMulti-step reasoning with comprehensive research capabilities\nComprehensive API for You.com services:\n- **Agents API**: Execute queries using Express, Advanced, and Custom AI agents\n- **Research API**: In-depth, multi-step research with citations and sources\n- **Search API**: Get search results from web and news sources\n- **Contents API**: Retrieve and process web page content"

That way .speakeasy/out.openapi.yaml carries the bullet forward, and every future regen preserves it.

The PR description already calls this out — worth tracking it as a follow-up issue if you're intentionally deferring.