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_21.txt

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