chore: Optimize vendor chunk size via Vite manualChunks

[vedxnt-10]

Resolves #656

Description

This PR resolves the Some chunks are larger than 800 kB warning produced during the Vite production build by optimizing how third-party dependencies are bundled.

Previously, all node_modules were lumped into a single massive vendor chunk (which exceeded 2MB), significantly impacting the initial load performance of the application.

Changes Made

• Updated manualChunks in vite.config.ts to explicitly split all dependencies inside node_modules into their own separate chunks, based on their package names.
• This successfully eliminates the chunk size warning and ensures the browser only downloads the smaller, relevant dependencies as they are needed.
• Note: React.lazy() and Suspense were already implemented effectively for routing within src/App.tsx, so no further dynamic imports were necessary.

Verification

• npm run build succeeds perfectly with well-distributed chunk sizes.
• npm run validate:components passes.
• All code changes are minimal and strictly targeted at resolving the Vite chunking issue.

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