Axios need to an explicit dep?

[Zaffer]

When running build I got this error:

> @xeroapi/xero-mcp-server@0.0.12 build
> tsc && shx chmod +x dist/*.js

src/clients/xero-client.ts:1:35 - error TS2307: Cannot find module 'axios' or its corresponding type declarations.

1 import axios, { AxiosError } from "axios";
                                    ~~~~~~~

src/helpers/format-error.ts:1:28 - error TS2307: Cannot find module 'axios' or its corresponding type declarations.

1 import { AxiosError } from "axios";

Running pnpm add axios first resolved the issue.