feat(i18n): add missing keys to Korean translation

[moduvoice]

Motivation

This adds Korean (ko) translation support — to help Korean-speaking users use this
open-source project more comfortably in their own language.
(한국 사람들의 오픈소스 이용에 도움이 되게 하기 위해서 한글화 작업을 하였습니다.)

Changes

• Completed apps/dokploy/public/locales/ko/settings.json, which was missing 13 keys (39/52) compared to en:
  • settings.common.enterTerminal
  • settings.server.webServer.traefik.managePorts, .managePortsDescription, .targetPort, .publishedPort, .addPort, .portsUpdated, .portsUpdateError, .publishMode
  • settings.terminal.connectionSettings, .ipAddress, .port, .username
• Verified apps/dokploy/public/locales/ko/common.json has no gap versus en (both are empty {}).
• Existing Korean translations were left untouched; only the missing keys were added, in natural Korean and matching the existing tone/terminology already used in the file.

Testing

• Wrote a small script to flatten and diff every key in en vs ko across both common.json and settings.json; confirmed ko now matches en key-for-key (52/52 in settings.json, 0/0 in common.json) with no missing and no extra keys.
• Validated the edited file is valid JSON.
• Checked for i18next placeholders (e.g. {{var}}) in both files — none exist, so no placeholder-preservation issues apply here.
• Ran npx @biomejs/biome check on the changed file — no formatting/lint issues.