Refactor App.tsx

[thtauhid]

The codebase is growing. It's becoming hard to maintain and navigate through the code.
We need to refactor App.tsx. These changes need to be made

• Create separate files for components
• move functions to separate files of their own

This should declutter App.tsx

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[thtauhid]

Will not be worked on right now as many PRs are expected soon.
Don't want everyone to rebase their code for no reason.