feat: maximal and minimal objectives

[wodeni]

Description

@keenancrane mentioned a repeated pattern of encourage equal(<some value>, 0). After some discussion, we decided to add maximal and minimal for sending single values to inf or -inf. This is similar to saying "minimize" and "maximize" in optimization problems.

[codecov]

Codecov Report

Merging #852 (c9f677f) into main (b20400a) will decrease coverage by 0.01%.
The diff coverage is 0.00%.

❗ Current head c9f677f differs from pull request most recent head ad99421. Consider uploading reports for the commit ad99421 to get more accurate results

@@            Coverage Diff             @@
##             main     #852      +/-   ##
==========================================
- Coverage   68.25%   68.23%   -0.02%     
==========================================
  Files          62       62              
  Lines        8058     8060       +2     
  Branches     1812     1812              
==========================================
  Hits         5500     5500              
- Misses       2478     2480       +2     
  Partials       80       80              

Impacted Files	Coverage Δ
packages/core/src/contrib/Objectives.ts	51.85% <0.00%> (-0.98%)	⬇️

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