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_16.txt

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