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_18.txt

@@ -0,0 +1,17 @@
+                                      
+               eddcddcdxoe            
+            eccedoccxeeoccdde         
+          eodxcccdcocoeccooe c        
+         oxxcooecc ceeeodxedeeeo      
+        eeoo ox  ecceeoxoxeedeee      
+        oex ooxoeeeoocoxcooeoeox      
+        xxedo     cocoxceoccxdxdo     
+        ceoxx     eecxxde   xdxc      
+       ecc oedddddcxxoxcoeo xcxe      
+        eeexcec xxoeeeexxxedxee o     
+        xoxeeccccccce eeeoxocoeoe     
+         ee oeo         eeccocec      
+          eecceeo      eceeoeoe       
+           cxoccccdddecceoeoc         
+             cxxeoeeooccdcc           
+                    e