Documentation: Add comparison section

[genu]

It would be great to see a section in the docs that highlights some of the important differences between this and other existing solutions.

I'm not sure why I would choose this over the official recommendations like Pinia or Vuex, etc.

I'm sure the value is there, but it's not clear.

[andrewcourtice]

@genu That's a great suggestion 😄

I'll update the docs in the next few days to include a comparison table with features compared to Pinia.

Thanks.