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_10.txt

@@ -0,0 +1,17 @@
+                                      
+              apooonppa               
+             ooapopnieaop             
+            aapiieiipipnpp            
+           iaaeninaenpoonnp           
+           e niioia opeaeie           
+          ia oioieen   aaoi           
+          n  ioooiiiio   iep          
+          o  iinpepiipaaenii          
+          o  in nniniipnpnii          
+          i  pinpiaeaoaaaioa          
+           p oiiiiioo nponia          
+           naopnpoo aioopee           
+            io iiiiopepeiea           
+             naooeipna eeo            
+              op aonapno              
+