chore: improve dx warn on undefined id

[semoal]

#863

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[codecov]

Codecov Report

Merging #874 (32d6c99) into main (d0b3eb5) will increase coverage by 0.09%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             main     #874      +/-   ##
==========================================
+ Coverage   82.76%   82.85%   +0.09%     
==========================================
  Files          51       51              
  Lines        1427     1435       +8     
  Branches      392      394       +2     
==========================================
+ Hits         1181     1189       +8     
  Misses        145      145              
  Partials      101      101              

Impacted Files	Coverage Δ
...ackages/babel-plugin-extract-messages/src/index.ts	82.11% <50.00%> (-2.24%)	⬇️
packages/core/src/dev/loadLocaleData.ts	100.00% <0.00%> (+100.00%)	⬆️

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[tricoder42]

Looks great 👏