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/codex/frame_25.txt

@@ -0,0 +1,17 @@
+                                      
+             ecdcdcccce               
+           o coceedexcxxo             
+          oxoooocoxcedexxxe           
+         xccx o  dx cexoceo           
+        oeeeoocedoexc xooeoc          
+        eoxxxeccoexd oxoxooxo         
+        xoxcx xeeoeeoxeoecxdx         
+        xxxoxoc xedeoxeexdxxe         
+       ecexcxeeddddcxxeexccxe         
+        oocxoxoxexxdcexecdoex         
+        excoexecccccccoxexoxe         
+         xecxdcdeoocdeooooxo          
+          eeexeeecdooeoexxo           
+           eodeeecdxcc cxc            
+             xoccecoecxc              
+