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_10.txt

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