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_11.txt

@@ -0,0 +1,17 @@
+                                      
+               pooooppa               
+              eo niiinnp              
+             eoaaiinnoenp             
+             iaaiinnpanee             
+            aoennipnonaiip            
+            ipaiipanniaeii            
+            oo piiiiiiainn            
+            i  iieiine ioi            
+            e  oieiioepiai            
+            oo aienpoeiaia            
+            oap iiiineinni            
+             napeiaoeoonia            
+              a oinnaaino             
+              np oiipaeoa             
+               na oopapa              
+