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/codex/frame_23.txt

@@ -0,0 +1,17 @@
+                                      
+            eocedccccdcee             
+         edxcxeeoeddoxexcxce          
+       occxcodce    cxdcxedxxo        
+      odxcdoe          eddexxde       
+     ooxeoc          ooooccocexe      
+    oexcoe         ecccccoccxxexo     
+    exxcx         odoo exe  c xcc     
+    xox x         xcxoeeo   x cox     
+    ece xcxddddddddxecxecee x xxx     
+    xeeexcdc       oee exeeox eex     
+     ocx x eccccccc   ceoddxeoeoe     
+      oxxexo             ooxeeoe      
+       e xocoee       eocdcoco        
+         edecdccexddecccoecce         
+           cx cdexeeceecce            
+