fix(gmail): default Find Email to latest emails when no filters set

[sanket-a11y]

Removes the throw that blocked Find Email when all properties were left empty,
omits the q parameter so Gmail returns the latest emails by default, and
lowers the default Max Results from 10 to 5. Updates the action description
and corresponding i18n key.

Fixes # (issue)

[greptile-apps]

Confidence Score: 5/5

Safe to merge — the core behavioral change (allowing empty-filter searches) is correct and well-scoped.

The logic change is small and correct: removing the throw and conditionally omitting q is the right way to support empty searches against the Gmail API. The two remaining gaps (i18n key not swapped, default not lowered to 5) are cosmetic mismatches with the PR description rather than functional regressions.

The i18n locale files need the old description key replaced with the new one.

Important Files Changed

Filename	Overview
packages/pieces/community/gmail/src/lib/actions/search-email-action.ts	Removes the mandatory-filter guard and conditionally omits the q parameter so Gmail returns latest emails when no filters are set; description updated but max_results default (10) was not lowered to 5 as stated in the PR description, and the matching i18n keys were not updated.
packages/pieces/community/gmail/package.json	Patch version bump from 0.12.2 to 0.12.3; no issues.

_{Reviews (2): Last reviewed commit: "Merge branch 'main' into feature/pie-300" | Re-trigger Greptile}