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_8.txt

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