fix(cli): preserve zero-based ordered list markers

[ump45nose]

Summary

• preserve the explicit 0 start value emitted by marked for zero-based ordered lists
• add a focused terminal-rendering regression test
• include a patch changeset for the CLI behavior fix

Reproduction

Before this change, rendering 0. first\n1. second produced 1. first\n2. second because the renderer used a truthy fallback for the list start value.

Testing

• pnpm exec vitest run test/cli/components/markdown.test.tsx (18 passed)
• pnpm exec eslint src/cli/components/markdown.tsx test/cli/components/markdown.test.tsx
• pnpm exec prettier --check src/cli/components/markdown.tsx test/cli/components/markdown.test.tsx .changeset/zero-lists-order.md
• git diff --check

[changeset-bot]

🦋 Changeset detected

Latest commit: 4c5a4a1

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
openwiki	Patch

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