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/openai/frame_34.txt

@@ -0,0 +1,17 @@
+                                      
+               apnppppnipa            
+           apopennioiponoonpna        
+         aeepiooeioa   aannpooop      
+        peaioaepa          oiponn     
+       eeinpei io p          nnona    
+      peniae nnoinon          npnin   
+      ioaia   onaoiaa          inia   
+      ninoe    ioaieoi         e an   
+      poeeo   eneeoannppppppiaao iaa  
+      iinpeppaoeeoiiiaieaaapeaiiain   
+       eanp inioa   oooaaaaa pepnio   
+        epnnnna             eneieo    
+         npaipnnp        apnoaepa     
+           pneioippnppnonoapoeo       
+             oinnnaaaaannona          
+                   aaa