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_35.txt

@@ -0,0 +1,17 @@
+                                      
+              appnnpppnppa            
+           ponoeioopoioieoiona        
+        aeeinpoiaooa  aoonoeoiop      
+       peepepnpa            opania    
+      eeiieen onop            inoip   
+     nenepa oiaoeeoa           inni   
+     n  ee    nn ooae           iann  
+     iiie      ennneo           e oe  
+     e pa    piienoeinnananpii  iino  
+     ipano  eenoopein npaaaaeoieo io  
+      eanpoenaieaa  aoaaaaoaaoeeapi   
+       oeanei               aeo pa    
+        nnaanpep          pneaooo     
+          oaaoioipeiipineooaeno       
+             oainnaaeaappooa          
+