feat(experimental): normalize emails during schema validate

[ping-maxwell]

Summary

email: true now trims and lowercases the value before the format check, so padded or mixed-case addresses validate and handlers always see a canonical form. Also switches the email regex to Zod's practical filter.

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/better-call@197

commit: 80a7602

[greptile-apps]

Greptile Summary

The PR updates the experimental email rule to trim and lowercase strings before validation and user transforms, while replacing the previous permissive format check with a narrower practical regex.

• Documents email normalization in the string-rule contract.
• Adds tests for canonical output, malformed input, and transform ordering.
• Updates an existing email fixture to satisfy the new format check.

Confidence Score: 5/5

The PR appears safe to merge with the intended email normalization and validation behavior covered by focused tests.

The normalized value is deliberately passed through subsequent rules and transforms, malformed values remain rejected, and no concrete repository path establishes an unintended regression.

_{Reviews (1): Last reviewed commit: "feat(experimental): normalize emails dur..." | Re-trigger Greptile}