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_22.txt

@@ -0,0 +1,17 @@
+                                      
+             eocdcddcdcoe             
+         ecocxoeoxoexxdxcocce         
+       odcdxecce    ecceccceeco       
+      dcxccc            ooxxxece      
+     exxoc            oeoxdxoodcx     
+    excoe           oxoxdeoe exedx    
+   xcceo           xcxecoc    xxox    
+   xxdxe           xexxee     xexcx   
+   xxoco cxddddddcceecxe eo   exdc    
+   exd ceeeo oocxoox  ecdecxoo oed    
+    eeeex cccccccce    edcceooocoe    
+     eceeeo               ecocxoc     
+      cccd cce         eococceo       
+        cdccoccxddcddodccccoc         
+           cxcxedeeeodeodce           
+