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_19.txt

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