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/codex/frame_31.txt

@@ -0,0 +1,17 @@
+                                      
+                eodccccdo             
+              eccdcoeccecco           
+             oxeooodeeocxece          
+            oxoceecdeoeexexxe         
+            exxxxcoceeocexoee         
+           dxeexexccedcoooxocx        
+           oxx xecxeododcxcxox        
+           eeo xxcxe xeccxxeox        
+           xeoexcexxxocxxxe  x        
+           cxxxooxxeeeeexexx c        
+           eceocxo occceoxcxe         
+            xxxeeeo     edc x         
+             dxcde o  o xceoe         
+              dxexoexeoxcoxe          
+               ccdxeccoodc            
+                   eeee