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_2.txt

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