Add libdates: Civil date difference calculator#65

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sam-at-luther merged 3 commits intomainfrom

Nov 12, 2025

Commits on Oct 29, 2025

Add libdates: Civil date difference calculator with O(1) YMD algorithm
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Improve godoc formatting with sections and proper lists
sam-at-luther
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Bump github.com/nyaruka/phonenumbers from 1.1.7 to 1.2.2
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