feat: export package.json type and sideEffects field by default for bundlers

[Boshen]

The fields are pretty small in size, but we can try and remove the clones if necessary.

[codspeed-hq]

CodSpeed Performance Report

Merging #196 will not alter performance

_{Comparing package-json-exports (42966d3) with main (9b9e97f)}

Summary

✅ 2 untouched benchmarks

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.89%. Comparing base (9b9e97f) to head (42966d3).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #196   +/-   ##
=======================================
  Coverage   96.88%   96.89%           
=======================================
  Files          11       11           
  Lines        2281     2283    +2     
=======================================
+ Hits         2210     2212    +2     
  Misses         71       71           

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