Generate typed REST API models from OpenAPI

[neubig]

• A human has tested these changes.

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Why

ConversationClient.createConversation() accepted a loose Record<string, unknown> payload, forcing frontend consumers to duplicate Agent Server request models by hand. Fixes #164.

Summary

• Regenerate swagger-doc.json from the current Agent Server OpenAPI schema and add generated TypeScript API models.
• Type ConversationClient.createConversation() with StartConversationRequest and the generated ConversationInfo response by default.
• Export generated REST payload/settings types from the root, clients entrypoint, and new @openhands/typescript-client/agent-server-api subpath.
• Add regression tests covering typed createConversation payloads with agent_settings and generated settings request/response exports.

Issue Number

Fixes #164

How to Test

• npm ci
• npm run build
• npm test -- --runInBand
• npm run lint
• npm run format:check

Video/Screenshots

Not applicable; this is a TypeScript type/API surface change.

Type

• Bug fix
• Feature
• Refactor
• Breaking change
• Docs / chore

Notes

Lint completes with the repository's existing warnings only (no errors).

This PR was created by an AI agent (OpenHands) on behalf of the user.

@neubig can click here to continue refining the PR