Implement config resolution, typed errors, HTTP and WebSocket transport helpers, and timeout handling for the SDK foundation. Add unit and local integration tests covering the SDK foundation behaviour and align package exports with the tsup output.
Initialized `package.json`, add tsup build config (CJS/ESM/DTS), wire up full Makefile targets (lint/test/check/build), add missing BadRequest response component to OpenAPI spec, generate TypeScript types from spec, configure biome to exclude generated files, and add `@types/ws`
