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/openai/frame_9.txt

@@ -0,0 +1,17 @@
+                                      
+              enaoeppnp               
+            eoaeiioon apna            
+           e piieoaane naip           
+          o iienna aapinaipp          
+         eoonnooiop oeopepii          
+         i iiioainnaa ioioiii         
+         a ioniooinnpoepe aii         
+        i  ieapniiiaennai  ii         
+           opio eioiiiipiipiia        
+         iaiiiapiaiaiiiiaaiii         
+         o aaennieoooooiioeni         
+          niiinpa     pe aeia         
+           npninn    enanieo          
+            aponaioepnnnoia           
+             opa onninpeo             
+