feat: exposes Quality::ResetToDefaults() via C bindings

[NickUfer]

Yesterday I started implementing rust bindings for this project and I wanted to run tests if my bindings for changing quality settings work as expected. I stumbled across the problem that tests fail when I run them all together instead of one by one.
I then pinned it down to the changed defaults, but I also figured out that there is no C binding for the reset function.

TL;DR: this PR exposes the Quality::ResetToDefaults() function via C bindings with roughly the same function name as for WASM (resetToCircularDefaults).

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 88.28%. Comparing base (d437097) to head (82a62fa).
Report is 108 commits behind head on master.

Files with missing lines	Patch %	Lines
bindings/c/manifoldc.cpp	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #964      +/-   ##
==========================================
- Coverage   91.84%   88.28%   -3.56%     
==========================================
  Files          37       62      +25     
  Lines        4976     8653    +3677     
  Branches        0     1044    +1044     
==========================================
+ Hits         4570     7639    +3069     
- Misses        406     1014     +608     

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[elalish]

Thanks! Great to hear about Rust bindings - when you have something to share, please add it to our README; I want to make it easy for people to find all the Manifold bindings / packages that exist.