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_26.txt

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