feat(ollama): add Ollama Rephrase service

[ZoneTwelve]

This PR adds an Ollama Rephrase service to rephrase text using Ollama, utilizing a built-in default prompt. This implementation is based on option 2 of issue #1072.

What changed

• Added a new localized string key ollama_rephrase for display name (en / sk / zh-Hans / zh-Hant).

• Registered a new service mapping in QueryServiceFactory:

• Implemented OllamaRephraseService (subclass of OllamaService) with:

  • Custom service name (NSLocalizedString("ollama_rephrase", ...))

  • Service type .ollamaRephrase

  • Stream configuration UI with translation/sentence/dictionary toggles and API key section hidden

  • Default rephrase prompts when custom prompt is disabled:

    • System: writing assistant instruction, return only rephrased text
    • User: “Rephrase the following text…” wrapper

Notes

• Sentence and dictionary are disabled by default for this service to keep behavior focused on rephrasing.
• Objective-C enum constants updated to include EZServiceTypeOllamaRephrase.

[github-actions]

Hello ZoneTwelve, Thank you for your first PR contribution 🎉 ZoneTwelve