add content to angular performance node (#6317)

src/data/roadmaps/angular/content/performance@STEHxJpwBZxFdQl0zUKxo.md

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 # Performance
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+Angular’s performance is enhanced through key strategies such as Deferable Views for improved initial load times, Image Optimization techniques to reduce loading overhead, and mitigation of Zone Pollution to streamline change detection. Additionally, addressing Slow Computations enhances runtime efficiency, while Hydration techniques support faster, more interactive server-side rendered applications.
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+Learn more from the following resources:
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+- [@video@From Good to Great: Optimizing Angular Performance](https://www.youtube.com/watch?v=tMxrY7IL-Ac)