fix(orgs): use singular/plural i18n keys in the bulk-delete dialog

[pedrofrxncx]

This tick's two merges (settings env-alias fallback #5483, chat latency prop removal #5482) turned out fully clean on re-inspection — resolve-config.ts's alias pairs all now use the safe resolveAliasedEnv helper, and common.tsx/generic.tsx have no leftover dead latency references. Widening the hunt to the same i18n plural-interpolation bug class fixed twice very recently in this area (#5477 provider-grid.tsx, #5479 secrets.tsx) turned up one more live instance.

orgs.bulkDeleteDialog.deleteButton/deleteDescription/deleteTitle build their pt-br strings as "conexão{plural}", where the caller (bulk-delete-dialog.tsx) always passes a hardcoded English plural: count !== 1 ? "s" : "". For count > 1 this renders "conexãos" instead of the correct pt-br plural "conexões" — an actual, visible grammar bug for any pt-br user bulk-deleting more than one connection.

Fix: replaced the three {plural}-templated keys with explicit Singular/Plural key pairs per locale (matching the pattern used in the #5479 fix), and updated the caller to select the key based on count === 1 instead of interpolating a suffix.

Failure scenario: a pt-br user selects 2+ connections and opens the bulk-delete dialog — before this fix, the dialog title/button/description read "Excluir 2 conexãos" (not a word) instead of "Excluir 2 conexões".

Reviewer check: cd apps/web && bunx tsc --noEmit (passes — pt-br/orgs.ts satisfies Record<keyof typeof en, string>, so a missing key would be a compile error), and manually open the org connections list, select 2+ connections, and trigger bulk delete with language set to pt-br.

Locally ran: bun run fmt, cd apps/web && bunx tsc --noEmit, bunx oxlint on the three changed files (all clean). No dedicated test exists for this component's i18n and none of the other required checks apply (no test file for this component); full CI covers the rest.

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Summary by cubic

Fixes pluralization in the org connections bulk-delete dialog by replacing suffix interpolation with singular/plural i18n keys. This corrects pt-br text (e.g., “conexões”) and avoids similar plural errors.

• Bug Fixes
  • Added ...Singular/...Plural keys for delete button, title, and description in en/orgs.ts and pt-br/orgs.ts.
  • Updated orgs/bulk-delete-dialog.tsx to select keys based on count === 1 and pass { count } only.
  • Removed the hardcoded English "s" suffix to produce correct pt-br grammar for counts > 1.

^{Written for commit 022f018. Summary will update on new commits.}