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_30.txt

@@ -0,0 +1,17 @@
+                                      
+                 edcccco              
+               eodxxeccde             
+               ccexoeexcoe            
+              xxexoxeexe eo           
+              dcxxeexoxo  x           
+             xcxec  cxxxxox           
+             eoxxxee eoex de          
+             cx ccdxoxcxo  e          
+             cxecexdxeoxo  e          
+             cxxexeexx co  e          
+              exxdeecxxxcxx           
+              xcoooocexxc x           
+              exexxocxxoxo            
+               oeocdeoxooc            
+                eooxeeedc             
+                  eeee