Replace lottie animations in favor of something more efficient

[denviljclarke]

Description

While the Lottie format animations we're using for the swap confirmation are small, the library used to display them is pretty large. As suggested by @jmrossy, it may be a good idea to swap this out for a solution smaller in size and less complex.

size of the current solution: 377K library lottie-react (315k, gzipped 79k) 62k each animation (31K each animation)

Acceptance Criteria

• [ ] A solution to display swap loading animations that is smaller in size

[RyRy79261]

Could just implement the loaders in css