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_10.txt

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