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_27.txt

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