✨ feat(icons): add VertexAIIcon component and update nodeIconsLucide to include VertexAI and ChatVertexAI icons

The VertexAIIcon component is added to the icons directory, allowing the usage of the Vertex AI icon in the application. The nodeIconsLucide object in the utils.ts file is updated to include the VertexAI and ChatVertexAI icons, enabling their usage in the application. This addition enhances the visual representation of the application by providing new icons related to Vertex AI functionality.