refactor: Clean up the Style compiler

[samestep]

Description

This PR cleans up compiler/Style:

• Make nameAnonBlock linear time
• Eliminate all ESLint warnings
• Remove a lot of throws via switch instead of if/else, and also better typing
• Add zip2 and zip3 utils to replace poorly-typed usages of _.zip
• Remove unused findSubstsProg

Checklist

• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new ESLint warnings

Open questions

• There are still several quadratic-time things that should really be linear-time (mostly using concat)
• There are still a few places where we throw "unknown tag" errors that we should clean up

[cloudflare-pages]

Deploying with    Cloudflare Pages

Latest commit:	816647d
Status:	✅  Deploy successful!
Preview URL:	https://241a6068.penrose-panes.pages.dev

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[codecov]

Codecov Report

Merging #817 (816647d) into main (7552b75) will increase coverage by 0.05%.
The diff coverage is 79.83%.

@@            Coverage Diff             @@
##             main     #817      +/-   ##
==========================================
+ Coverage   67.81%   67.86%   +0.05%     
==========================================
  Files          61       61              
  Lines        7643     7640       -3     
  Branches     1378     1375       -3     
==========================================
+ Hits         5183     5185       +2     
+ Misses       2451     2445       -6     
- Partials        9       10       +1     

Impacted Files	Coverage Δ
packages/core/src/compiler/Style.ts	86.51% <79.12%> (+0.32%)	⬆️
packages/core/src/engine/Optimizer.ts	81.25% <83.33%> (ø)
packages/core/src/utils/Util.ts	66.17% <87.50%> (+1.34%)	⬆️
packages/core/src/compiler/Substance.ts	91.22% <100.00%> (+0.02%)	⬆️
packages/core/src/engine/Evaluator.ts	64.75% <100.00%> (ø)
packages/core/src/renderer/Resample.ts	24.07% <100.00%> (ø)

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