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_6.txt

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