Fix the label of the OpenAI-compatible API keys

[mrubens]

Should be "API Key" instead of "OpenAI API Key"

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Important

Update OpenAI-compatible API key label to "API Key" and adjust localization files for multiple languages.

• UI Label Update:
  • In OpenAICompatible.tsx, change label text from OpenAI API Key to API Key.
• Localization:
  • Add apiKey entry in settings.json for multiple locales: ca, de, en, es, fr, hi, it, ja, ko, nl, pl, pt-BR, ru, tr, vi, zh-CN, zh-TW.
  • Ensure apiKey is translated appropriately in each locale file.

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