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_17.txt

@@ -0,0 +1,17 @@
+                                      
+                pnpppnnipa            
+             anooiiionoipoap          
+            poneannappoiiiaon         
+           eieaeioaa oinniiinn        
+           iea i    ioennnee  p       
+          anopea   peei epneiee       
+          o nei   peeia ooiieni       
+          poni     eeiieipiinno       
+          peoennnpinainaeniii i       
+           ioanaaieoneiin npopn       
+          nnneooooooonaioeen no       
+           niiao       aeiia n        
+            ann ona   popeaae         
+             p iopnnpaanoeio          
+              apneappioapo            
+                   a