[UI] Configure App Splash Screen

[brianwachira]

• Configure the app splash screen from the default expo splash screen to the one laid out on the design
• Follow contribution guidelines laid out in our contribution guide

Additional context

[mog-rn]

@brianwachira I'd like to also work on this one on top of what you had assigned me.

[brianwachira]

@brianwachira I'd like to also work on this one on top of what you had assigned me.

Sure thing! If you find any other that you would like to work on, you can go ahead and assign yourself the issue / task. All the best!

[mog-rn]

ok great @brianwachira