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_14.txt

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