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_3.txt

@@ -0,0 +1,17 @@
+                                      
+             eoddccddddoe             
+         ecooexxcxcddxdeexcce         
+       odocdxccce   ecx cccoexo       
+      ocoexdoce          edc xxe      
+     cocxoeoxxcee           eeexxe    
+    oxeeo  ooxedee           x eex    
+    dc x    ccexecxo          ocoxo   
+   ooxox     ooxcoex          xexdx   
+    occx    dxccxxcoxdcceeeccexecdx   
+    oedeo oocoddx xcxeeo doodeexexe   
+    cex x cxxcoc   cccccccccoooooo    
+     ccx ec e              oeceoo     
+       deooceo          ocdocoxc      
+         decoecceddddoddcdeecc        
+           ecccedxeeeexdoec           
+