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_30.txt

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