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/slug/frame_10.txt

@@ -0,0 +1,17 @@
+                                      
+              dtpppottd               
+             ppetptox5dpt             
+            ddtee5xx-xtott            
+           edd5oecd-otppoot           
+           5 ceeged pt5d5e5           
+          ee pepx55o  gedge           
+          o  xpgpeexep   e5t          
+          g  eeot5tee-de-oee          
+          g  xo ooecxxtotcee          
+          e  teoted5dpdddepe          
+           t geeeeegggotgoee          
+           oeptotpg dxggt55           
+            ep eeexptct5e5e           
+             cepp5etcdg55p            
+              pt dpodtcp              
+