Change animation frames (#3627)

## Description
- Changes animation frames to be smaller
- Cleans up file names and popup logic

## tests
- Passes local CI

codex-rs/tui/frames/slug/frame_30.txt

@@ -0,0 +1,17 @@
+                                      
+                 dcgpptt              
+               d5ceeoppoo             
+               gpdetooetto            
+              eeoe5edoeo ot           
+              opeeeoetet  e           
+             epedt  peeee-e           
+             o5eeeod o5oe oe          
+             ge ptoxtege-  e          
+             gedgoxoxo5et  e          
+             geeoeddxegtt  e          
+             goeecodpxeetxe           
+              ep55t5poeeg e           
+              oeoee5pxetx5            
+               tdttod5et5p            
+                o--edddcp             
+                  eeee