feat: add loader

[ansh-saini]

Feature #5

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[anup-a]

I'm not sure if this is the right way to add loader.

I use to do it using onload attribute on body tag.

[ansh-les]

@anup-a I've changed the implementation. Please take a look.
Although the loader doesn't really show up because the app loads almost instantly. Should I add a setTimeout of 1s to make it somewhat visible?

[anup-a]

@ansh-les it is good enough... ( though I couldn't even see the loader once 😅😄)
Lets leave as it is for now.

[anup-a]

Great work, I think it is ready to merge.
Give us a ⭐ on the repo.

[ansh-saini]

Yay! 👍