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_5.txt

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