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_7.txt

@@ -0,0 +1,17 @@
+                                      
+             eoxdccddcoe              
+          ocecexcccdded eco           
+         c oxxxce  eexe coeco         
+        eexxxxdc       execxoo        
+       ecxcxxexoeo       o cxxe       
+      x dxxc ecedxe       ooxxx       
+       eecx  eexexex       ccexx      
+      ecoxx   dcoxcxe      c xxx      
+       ocxc oceoxeoxxddexxddcexx      
+      xocxxddxxocxoexxeeododexex      
+       e deocxceo  cccccccceoxx       
+       ce oeoee         ocoodoc       
+        cdoceeee      oexococc        
+          eecexcedxeeeccxcco          
+            cxccxdxeeoedcc            
+