⚡ Bolt: memoize IconifyIcon lookup

[sshahriazz]

💡 What: Implemented a Map cache for the iconData lookup inside the IconifyIcon component.

🎯 Why: To prevent an O(N) lookup scan across all imported JSON icon sets for every rendered icon. Without this cache, Next.js and the React render loop have to iterate continuously across huge arrays for every single icon that loads on the page, blocking the main thread during heavy rendering.

📊 Impact: Expect highly reduced render times for pages using many icons, moving iconData lookups from O(N) complexity to O(1). Rendering a grid of 100 icons now takes ~1 lookup operation per unique icon instead of 100 * N loop iterations.

🔬 Measurement: This optimization can be verified by capturing a performance profile via React Developer Tools or Chrome DevTools while rendering a page with many icons. The rendering duration for the IconifyIcon component will be observably lower.

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PR created automatically by Jules for task 16995881411765242587 started by @sshahriazz

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