⚡ Bolt: Optimize Iconify to fetch icons on-demand

[sshahriazz]

💡 What: Refactored IconifyIcon.tsx to stop statically importing all @iconify-json/* datasets and instead use the built-in on-demand fetching of @iconify/react.
🎯 Why: Statically importing the entire datasets for icon sets like Material Symbols, FontAwesome, MDI, etc., defeats tree-shaking and causes massive bundle bloat, as thousands of unused icons are compiled into the client bundle.
📊 Impact: Significantly reduces the initial JavaScript payload size and improves load times, as icons are now only fetched on-demand when actually rendered by the client.
🔬 Measurement: Run pnpm run build in the client directory to verify the successful compile and observe the smaller chunk sizes compared to before. The UI can be verified by running pnpm run start and confirming icons still load.

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PR created automatically by Jules for task 15814126345670838568 started by @sshahriazz

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