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/dots/frame_8.txt

@@ -0,0 +1,17 @@
+                                      
+             ○○●○◉●●○●●○              
+           ● ●◉···●○○ ·  ●            
+         ○·○●·◉◉● ● ·◉·●○●○●          
+        ○●○●◉·●●·     ● ○○··○         
+        ● ◉·◉●○·◉○      ◉●○··●        
+       ·●●·○○○○○·○●      ○●···        
+       ·●··· ●○◉○···     ·○·◉·●       
+       ○●··◉  ·●○◉·●●◉    ◉·◉··       
+       ○ ○··○○  ◉●○··◉●●●●●○···       
+          ○●◉○○· ●·●··◉·○○○··○●       
+        ◉◉○○·○···◉●○●○● ○● ◉○·        
+        ●● ·○···        ◉●◉◉◉●        
+         ●○○●○○○○    ○◉○○·●◉●         
+           ◉◉●·●● ◉◉●●◉◉○●··          
+             ··○●●○·○●●◉○·            
+                  ··