navicat-premium-lite: add official language variants

[Kassell]

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After making any changes to a cask, existing or new, verify:

• The submission is for a stable version or documented exception.
• brew audit --cask --online <cask> is error-free.
• brew style --fix <cask> reports no offenses.

Additionally, if adding a new cask:

• Named the cask according to the token reference.
• Checked the cask was not already refused (add your cask's name to the end of the search field).
• brew audit --cask --new <cask> worked successfully.
• HOMEBREW_NO_INSTALL_FROM_API=1 brew install --cask <cask> worked successfully.
• brew uninstall --cask <cask> worked successfully.

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• AI was used to generate or assist with generating this PR. Please specify below how you used AI to help you, and what steps you have taken to manually verify the changes, including zap stanza paths.

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Map Homebrew locales to Navicat's official localized DMG names and keep
English as the default download.

Add support for Simplified and Traditional Chinese regional locales, plus
Japanese, French, German, Spanish, Polish, Korean, Russian, Indonesian, and
Thai.

Added mappings:

• zh-CN, zh-SG -> cs
• zh-HK, zh-MO, zh-TW -> ct
• ja -> jp
• fr
• de
• es
• pl
• ko -> kr
• ru
• id
• th

Verification:

• Verified the vendor-hosted URLs on the existing cask URL pattern:
  https://dn.navicat.com/download/navicat17_premium_lite_<code>.dmg
• Confirmed HTTP 200 for:
  en, cs, ct, jp, fr, de, es, pl, kr, ru, id, th

Notes:

• This follows Homebrew's guidance to use the language stanza for
  localized casks.
• US English remains the default language.
• I was not able to complete brew audit --cask --online navicat-premium- lite locally because the local Homebrew bundler environment failed while
  resolving sorbet-runtime.
• AI was used to help draft this cask change and PR text. I manually
  verified the locale mappings and vendor-hosted download URLs.