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_29.txt

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