Shared attributes

[TimSylvester]

Vertex attribute arrays are managed using shared_ptr.
Eliminates the means to copy assign or construct them entirely for code size.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (5911f01) 85.74% compared to head (06252ee) 85.73%.
Report is 1 commits behind head on main.

❗ Current head 06252ee differs from pull request most recent head 3033880. Consider uploading reports for the commit 3033880 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1898      +/-   ##
==========================================
- Coverage   85.74%   85.73%   -0.02%     
==========================================
  Files         568      568              
  Lines       28026    28027       +1     
==========================================
- Hits        24031    24028       -3     
- Misses       3995     3999       +4     

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[github-actions]

Bloaty Results 🐋

Compared to main

    FILE SIZE        VM SIZE    
 --------------  -------------- 
  -0.6%  -800Ki  -0.7%  -219Ki    TOTAL

Full report: https://maplibre-native.s3.eu-central-1.amazonaws.com/bloaty-results/pr-1898-compared-to-main.txt

Compared to d387090 (legacy)

    FILE SIZE        VM SIZE    
 --------------  -------------- 
   +18% +21.4Mi  +399% +23.9Mi    TOTAL

Full report: https://maplibre-native.s3.eu-central-1.amazonaws.com/bloaty-results/pr-1898-compared-to-legacy.txt

[TimSylvester]

Hm, I didn't realize auto-merge would trigger without more approvals. @louwers @mwilsnd should I create a revert PR?

[mwilsnd]

I've been testing it this morning and all looks good to me. That size reduction alone is worth it.