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_35.txt

@@ -0,0 +1,17 @@
+                                      
+              eocddcccdcoe            
+           ocdcoxccccxcxdcxcde        
+        eooxdccxecce  eccdcocxco      
+       ooocoodoe            cceexe    
+      ooxxooe ceco            xecxo   
+     dodoce cxecooce           xeex   
+     e  oo    ee cceo           xeee  
+     xxxd      oeedoc           o co  
+     o oe    oxxodcoxddededcxx  xxdc  
+     xoedc  oodcccoxd eoeeeeocxoc xc  
+      oeeocoeexoee  eceeeeceecooeox   
+       coeeox               eoc oe    
+        edeedodo          odoeccc     
+          ceecxcxodxxcxdocceodc       
+             cexddeeoeecccce          
+