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_3.txt

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