feat(order): add helpful text when using postnl age check

[EdieLemoine]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 65.15152% with 23 lines in your changes missing coverage. Please review.

Project coverage is 67.50%. Comparing base (5fa26b0) to head (0329e95).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...dmin/src/forms/helpers/setPostNlAgeCheckSubtext.ts	52.94%	8 Missing ⚠️
apps/admin/src/forms/helpers/hasPostNlAgeCheck.ts	63.63%	4 Missing ⚠️
apps/admin/src/forms/helpers/createLabel.ts	33.33%	0 Missing and 2 partials ⚠️
...orms/shipmentOptions/fields/createAgeCheckField.ts	33.33%	2 Missing ⚠️
...forms/shipmentOptions/fields/createCarrierField.ts	33.33%	2 Missing ⚠️
...admin/src/forms/helpers/addBulkEditNotification.ts	66.66%	1 Missing ⚠️
apps/admin/src/forms/helpers/getFieldLabel.ts	83.33%	1 Missing ⚠️
...shipmentOptions/fields/createOnlyRecipientField.ts	50.00%	1 Missing ⚠️
...hipmentOptions/fields/createShipmentOptionField.ts	66.66%	1 Missing ⚠️
...rms/shipmentOptions/fields/createSignatureField.ts	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #222      +/-   ##
==========================================
- Coverage   67.50%   67.50%   -0.01%     
==========================================
  Files         688      692       +4     
  Lines       19172    19226      +54     
  Branches      809      812       +3     
==========================================
+ Hits        12942    12978      +36     
- Misses       5577     5594      +17     
- Partials      653      654       +1     

Flag	Coverage Δ
unit	67.50% <65.15%> (-0.01%)	⬇️

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[joerivanveen]

Ik vind het er goed uitzien en een nuttige toevoeging, maar moet er niet wat functionaliteit in tests vastgelegd worden? (Codecov mekkert.)

[EdieLemoine]

@joerivanveen eens, maar niet in deze story, heeft haast en is inmiddels al getest