add claude code support on proxy

[anyrobert]

it closes #1

Summary

Refactors the codebase for clearer structure, consistent hyphen-case naming, shared utilities, and a version bump to 0.2.0.

Changes

• Split server and modularize handlers
  • Split server.ts into focused modules:
    • Handlers (handlers/): health, models, chat-completions, anthropic-messages
    • workspace.ts: Resolves workspace and temp dir
    • agent-runner.ts: Runs agent sync/stream with temp dir cleanup
    • request-listener.ts: Routes requests, auth, and error handling
• Rename to hyphen-case
  • cursorCli → cursor-cli
  • requestLog → request-log
  • modelMap → model-map
• Shared utilities
  • agent-cmd-args.ts: buildAgentCmdArgs() for CLI args
  • resolve-model.ts: resolveModel() for model selection
  • cli-stream-parser.ts: parseCliStreamLine() for stream parsing
  • request-log.ts: logAgentError() for agent error logging
  • http.ts: writeSseHeaders() for SSE responses
• Version handling
  • Version set to 0.2.0
  • CLI reads version from package.json so it stays in sync

Testing

Existing tests pass (npm test)
Build succeeds (npm run build)