Add testimonials

[sansyrox]

Add human testimonials instead of company names. We will have to create a randomized carousel(preferably using tailwind components - https://tailwindui.com/components) to showcase the testimonials!

Can be found here - https://robyn-docs.vercel.app/

[KanishkKhurana]

since tailwindUI is a paid library, we can use splide.
let me know incase you have any suggestions around this, i can research some more good ones

[KanishkKhurana]

dummy testimonials have been added according to the theme. these can be replaced with actual content from our users.
here is the commit - 86dcc5b