feat(ui): add loading/splash screen

[orhun]

Description of change

This PR adds the project logo in the loading screen. It's absolutely useless but looks cool - only steals 500ms of your time.

I still need to fix the issue where the splash screen is show while switching from shared libraries.

How has this been tested? (if applicable)

On a livestream.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 36 lines in your changes missing coverage. Please review.

Project coverage is 3.41%. Comparing base (3ec5db4) to head (992750f).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/tui/widgets/logo.rs	0.00%	20 Missing ⚠️
src/tui/ui.rs	0.00%	15 Missing ⚠️
src/tui/state.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##            main     #55      +/-   ##
========================================
- Coverage   3.47%   3.41%   -0.05%     
========================================
  Files         18      19       +1     
  Lines       2340    2376      +36     
========================================
  Hits          81      81              
- Misses      2259    2295      +36     

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