Preserve adjacent negative polygon coordinates

[OskarEichler]

Summary

extractPolyPoints tries to insert a separator before a minus sign that follows another coordinate, but its regex consumes the preceding character and replaces only the first match. Valid points such as 0,0 10-10 20-20 become 0 0 1 -10 20-20, corrupting Polygon and Polyline geometry.

Capture and preserve the character before each adjacent minus and apply the replacement globally. Exponent signs such as 1e-3 remain part of the same number.

Test Plan

What is required?

The existing Jest environment.

Steps and results

• Added a regression covering multiple adjacent negative coordinates; exact baseline loses the zero from 10 and leaves the second pair unsplit.
• Added an exponent regression proving 1e-3 remains intact.
• Exact baseline passes 1/2; the fixed focused suite passes 2/2.
• yarn test, yarn bob, and git diff --check pass.

Compatibility

OS	Implemented
iOS	✅
MacOS	✅
Android	✅
Web	✅

Checklist

• I have tested this on a device and a simulator — pure shared parser behavior covered by Jest
• I added documentation in README.md — no public API or documentation change
• I updated the typed files (TypeScript parser implementation)
• I added regression tests in the __tests__ folder

Breaking changes

Only previously corrupted valid point strings change; API and correctly parsed inputs are unchanged.