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/shapes/frame_12.txt

@@ -0,0 +1,17 @@
+                                      
+                □□□□□△                
+               ▲●◆◆△◇▲○               
+               ■  ◇△○□▲               
+               △□◇◇◇●●■◇              
+              ◇ ■◇◇◇◇△△◇              
+              ◇■△△□○■◆◇■              
+              ◇   ◇△○◇◇○              
+              ◇   △□○◇◇■              
+              □▲ ◇△◇◇□◇◇              
+              ◇   △◇□●□◆              
+              ◇△  ◇■●□□△              
+               ▲  □◇ ◆▲◇              
+               △ □□◇▲□○◇              
+               ■○△■▲◇○◇◆              
+                ○ ■◇○△△               
+