Fix editor warp crash

[elalish]

I was finding that warp would sometimes crash (saying something really unhelpful like out of memory) and then the editor was unusable until after a reload. I fixed this three ways:

1. When the worker throws an error, we now recreate it, like when we cancel. This keeps the editor usable.
2. I added our non-finite vertex check to Warp - turns out I was just generating a NaN somewhere.
3. I surfaced this error through to throw in the JS bindings, so you actually get some feedback on what went wrong.

[codecov]

Codecov Report

Patch coverage: 85.71% and project coverage change: -0.04 ⚠️

Comparison is base (eb41b9d) 89.70% compared to head (f8fbb7f) 89.67%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #442      +/-   ##
==========================================
- Coverage   89.70%   89.67%   -0.04%     
==========================================
  Files          35       35              
  Lines        4237     4243       +6     
==========================================
+ Hits         3801     3805       +4     
- Misses        436      438       +2     

Impacted Files	Coverage Δ
src/manifold/src/impl.h	72.72% <ø> (ø)
src/manifold/src/impl.cpp	95.36% <84.61%> (-0.36%)	⬇️
src/manifold/src/manifold.cpp	91.94% <100.00%> (-0.21%)	⬇️

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[geoffder]

Was going to say I might not get to this and the rest of the other PR right away since I've got my bros wedding tomorrow, but you beat me to merging anyway! 😅

[elalish]

Have fun! I'm out this weekend too, so wanted to merge this before I went to bed - more of an FYI in case I generated any merge conflicts for you.

[geoffder]

Roger, I'll plan to pull in master when I'm back at it for the formatting checks and these fixes.