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/slug/frame_11.txt

@@ -0,0 +1,17 @@
+                                      
+               tppppttd               
+              5g ceeeoot              
+             5gddeecop5ot             
+             eddeeoctdo55             
+            dg-coetopcdeet            
+            eteeetdcced5ee            
+            pp teeeeeedeoo            
+            e  ee5eeo5 ege            
+            5  pe5eep5tede            
+            pp de5otg5eded            
+            pe- eeeeo5eooe            
+             od-5edp5ppcee            
+             gd peooddecg             
+              otgpeetd5pe             
+               od pptdte              
+