chore(frontend): changed source code to src folder from root

[akhilmhdh]

Why this change.

1. Moving the source code to src folder and keeping all frontend configs will immensely help to have a clear separation of concern.
2. Like docker mounting, tailwind config all those will be easier to configure
3. Patched lockfile from swc issue
4. Added a new ts path called @app -> src. Thus call imports can regarding file be made like from now on:

import {} from "@app/folder1/folder2/"

[akhilmhdh]

@mv-turtle If this was decided to keep due to pages folder file based routing.

No worries cause nextjs will identify pages inside src

Ref: https://nextjs.org/docs/advanced-features/src-directory