Adds Yangtze River map (crescent shaped pipe river map)

[crunchybbb2]

Purpose

Adds Yangtze River crescent pipe map using impassable terrain

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Objectives

• Is a crescent shaped river map based on a portion of river near the mouth of Yangtze River in China
• 9 Nations based on cities (No additional nations)
• 1.87mil land area. Slightly larger than mississippi (?)

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Description

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Assignment

• I'd like to be assigned to this issue and work on it myself

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[Discord Name if Different] crunchybbbbb

[github-actions]

Hi @crunchybbb2, thanks for opening this issue. It hasn't been approved by a maintainer yet — we'll get back to you shortly to either milestone it (approval) or close it.

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