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_4.txt

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