fix(deps): update dependencies to use google/genai

[lacolaco]

This pull request includes significant changes to the tools/translator/translate.ts file and a dependency update in the package.json file. The primary focus is on updating the Google Generative AI library and refactoring the translation logic to accommodate this update.

Dependency update:

• package.json: Updated the dependency from @google/generative-ai to @google/genai and changed the version to ^0.8.0.

Refactoring translation logic:

• tools/translator/translate.ts: Replaced imports of GoogleGenerativeAI and GoogleAIFileManager with GoogleGenAI. Updated the class properties and constructor to use the new GoogleGenAI client.
• tools/translator/translate.ts: Removed the detailed model configuration and chat session setup from the translate method. Instead, used the GoogleGenAI client to generate content directly.
• tools/translator/translate.ts: Simplified the translation prompt and adjusted the response handling to accommodate the new API. Added a fallback for cases where no response is received.
• tools/translator/translate.ts: Removed redundant input format instructions from the translation prompt.

[Copilot]

Copilot reviewed 2 out of 3 changed files in this pull request and generated 1 comment.

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• package.json: Language not supported

[Copilot]

The conditional check on response.text may inadvertently treat a valid empty string as a missing response. Consider explicitly checking for undefined or null to distinguish an empty but valid response from an error.

Suggested change

	if (response.text) {
	if (response.text !== undefined && response.text !== null) {