Support for gemini-2.5-pro-preview-05-06

[gauravvgat]

Is your feature request related to a problem? Please describe. I don't see an option to use latest gemini-2.5-pro-preview-05-06 model with Genkit.

Describe the solution you'd like Add another definition of model in gemini plugin.

export const SUPPORTED_V15_MODELS = {. 'gemini-1.5-pro': gemini15Pro, 'gemini-1.5-flash': gemini15Flash, 'gemini-1.5-flash-8b': gemini15Flash8b, 'gemini-2.0-flash': gemini20Flash, 'gemini-2.0-flash-lite': gemini20FlashLite, 'gemini-2.0-pro-exp-02-05': gemini20ProExp0205, 'gemini-2.0-flash-exp': gemini20FlashExp, 'gemini-2.5-pro-exp-03-25': gemini25ProExp0325, 'gemini-2.5-pro-preview-03-25': gemini25ProPreview0325, 'gemini-2.5-flash-preview-04-17': gemini25FlashPreview0417, };