fix(auth): ignore broken pipe in token view

[goncalossilva]

Summary

• Make auth token-view stdout writes tolerate downstream pipe closure (EPIPE)
• Keep non-EPIPE stdout write errors visible
• Add regression coverage for early pipe close behavior

Test plan

• npm run type-check
• npm run check
• npm test -- src/auth/token-view.test.ts
• pre-push hook also ran full npm test: 34 files passed, 517 tests passed, 1 skipped

Context

This fixes the stack trace seen when a script consumes only part of td auth token view / tdc auth token view output and closes the pipe early.

The implementation lives in @doist/cli-core, so Todoist CLI and Comms CLI should pick it up by bumping cli-core after this is released.