Remove sea-only squares, large square boundaries, and overlapping duplicates from WABSquares.geojson#3405

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Copilot wants to merge 6 commits intomasterfrom

copilot/clean-up-wab-squares-geojson

Commits on Jan 20, 2026

Initial plan
Copilot
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Remove sea-only squares and large square boundaries from WABSquares.geojson

Copilot
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magicbug
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Remove Irish Grid squares to fix overlapping squares issue

Copilot
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magicbug
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Keep Irish squares, only remove overlapping duplicates and large boundaries

Copilot
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magicbug
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Remove sea-only squares while keeping Irish Grid land squares

Copilot
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magicbug
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Include Scottish island grids (NL, HW, HT, HU, etc.) to restore NL57, NL58, HW83

Copilot
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magicbug
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