Svelte 5 正式發布：全新 Runes 反應式系統與 Snippets 帶來前端開發新體驗

Svelte 5 is the most significant update in the framework's history, aimed at resolving development bottlenecks that arise as applications scale. The centerpiece of this update is the introduction of a brand-new reactivity system called "Runes." Runes are based on a Signal mechanism, using explicit syntax such as `$state`, `$derived`, and `$effect` to manage state. This change addresses the difficulty of tracking and maintaining Svelte 3/4's reactive syntax (such as `$:`) in complex scenarios, and allows reactive logic to be used seamlessly across both `.svelte` files and regular `.js/.ts` files.