docs(readme): fixup links and bundlephobias

[Slashgear]

Why

Some links are broken in the global readme of the repository

• bundlephobia pages are not working because package does not export entrypoints
• they are broken links in growthbook package

How

• fix global readme links
• re-add main entry to make bundlephobia working

@QuiiBz What is your opinion on re-adding main key on package ?

[changeset-bot]

⚠️ No Changeset found

Latest commit: 75aaa72

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (31f9adc) 98.49% compared to head (75aaa72) 98.49%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1599   +/-   ##
=======================================
  Coverage   98.49%   98.49%           
=======================================
  Files          30       30           
  Lines         797      797           
  Branches      115      115           
=======================================
  Hits          785      785           
  Misses          2        2           
  Partials       10       10           

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[QuiiBz]

We shouldn't (and don't) need the main field in each package.json, since we're using the "new" exports field instead which covers all our needs.

It's probably a bug (or at least an unsupported feature) of bundlephobia to not support the exports field - example with packagephobia, which supports it fine: https://packagephobia.com/result?p=%40scaleway%2Fjest-helpers

[Slashgear]

Ok I will change that