docs: explain dep handling in dev and build

[bluwy]

Description

Closes #4680

Additional context

The docs in this spot right now could be off, since the first part of this page is small sense of "pride". The note blockquote however contrasts a small pitfall. Maybe it should be in a new section on the page?

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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