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_19.txt

@@ -0,0 +1,17 @@
+                                      
+              eeddcxcddxoe            
+           ecxxxeodddeceoxcoo         
+         ocddocxcce    ecdoecde       
+        odxcoee         eddcoexco     
+       xxoeoe         oxecocxe xeo    
+      xeocc         excxo oo cocx     
+      edxxc        oceoxcoe   odocx   
+      xxxx         xdcexco    x xxx   
+      xcxeoddddddxxxxccdcxd   e cxx   
+      edooxdcoecceoeo ee deeeoooxe    
+      cecocxcccccccc   eeeoxoo ooc    
+       eeecee             eooeooc     
+        c eexxco        oddooxde      
+          ccoxcoxceeddocc dcxc        
+             cxoedoceooecoe           
+