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_12.txt

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