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_24.txt

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