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/vbars/frame_3.txt

@@ -0,0 +1,17 @@
+                                      
+             ▎▋▌▌▉▉▌▌▌▌▊▎             
+         ▎▉▊▋▍▏▏▉▏█▌▌▏▌▎▍▏▉▉▎         
+       ▊▌▋▉▌▏▉██▎   ▎█▏ ▉▉▉▋▍▏▊       
+      ▋▉▋▍▏▌▊▉▎          ▎▌▉ ▏▏▍      
+     █▋▉▏▋▍▋▏▏▉▍▎           ▍▍▍▏▏▎    
+    ▋▏▍▍▋  ▋▊▏▍▌▍▍           ▏ ▍▍▏    
+    ▌▉ ▏    █▉▍▏▎█▏▊          ▋▉▋▏▊   
+   ▊▊▏▊▏     ▊▊▏█▋▍▏          ▏▎▏▌▏   
+    ▊██▏    ▌▏▉▉▏▏▉▊▏▌▉▉▎▎▎▉▉▎▏▍█▌▏   
+    ▊▍▋▍▊ ▋▋▉▋▌▌▏ ▏▉▏▎▎▊ ▌▋▊▌▍▎▏▍▏▎   
+    █▍▏ ▏ █▏▏▉▊█   █▉▉▉███▉▉▊▋▋▋▊▋    
+     █▉▏ ▍▉ ▎              ▋▍▉▍▋▋     
+       ▌▍▋▋▉▍▊          ▊▉▌▋█▊▏█      
+         ▌▍▉▊▎▉▉▍▌▌▌▌▊▋▌▉▌▎▎▉█        
+           ▎▉▉▉▎▋▏▎▎▎▎▏▌▋▍█           
+