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/slug/frame_35.txt

@@ -0,0 +1,17 @@
+                                      
+              dttcotttottd            
+           tpop-xpptgepxcgxpod        
+        d55ectpedpge  egpop-gept      
+       t55t5tctd            ptdoed    
+      55xe55o gopt            eopet   
+     c5c5te pedg--pd           eooe   
+     o g-5    oo ppd-           edoo  
+     xexc      5ooc5p           5 g5  
+     5 td    tee5cg5eoodcdotxx  exop  
+     etdcp  55cgpt5ec otdddd5gx5p ep  
+      5eotp5ode5de  egddddpddp55dte   
+       g-do5x               d5p td    
+        ocedctct          tc5dppp     
+          gddgxpx-cxxtxc5pgd5cg       
+             gdxcodd5ddttpgd          
+