fix(prompt): prompt does not respect [body-leading-blank] setting

[weixinwu]

Description

My attempt to fix the prompt not respecting body-leading-blank setting issue in #3826 .

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

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[escapedcat]

Any way to add add a test for this?:
https://github.com/conventional-changelog/commitlint/blob/88cb735e96f05ad3a998356c95eb00527e54bb9f/%40commitlint/prompt/src/input.test.ts

[escapedcat]

Thx @weixinwu !