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_27.txt

@@ -0,0 +1,17 @@
+                                      
+                nooopp                
+               ineeien                
+              noa oieoi               
+              iiiaiinii               
+              i  aiapon               
+              iaeaoaiiia              
+              n oiiaoii               
+             i  aiiinoii              
+             ie e ipiiii              
+             on eoaiaoii              
+              ip aaoopeo              
+              iippiiaei               
+              innpnpeia               
+               naainnee               
+               ono ane                
+