add searchbar animation effect in searchbar.vue

[vizzv]

Adding Search Bar animation as mentioned and colored is inspired by the logo color. Adding a class name animation-box and adding animation to animation-box class.

[FlavioAdamo]

Thanks for your work! Unfortunately the Issue has already been assigned, which is why we cannot accept the PR. For the future, I recommend testing the code well before creating a PR. If you notice your implementation doesn't work in light mode. I'm sorry this happened and we'll stay in touch for future implementations!