refactor: Update starship.toml file path and add optional icon parameter in setup.sh

setup.sh

@@ -34,12 +34,12 @@ overwrite_starship_toml() {
     if [ -f "./terminal/starship.toml" ]; then
         echo "Overwriting starship.toml..."
         mkdir -p ~/.config/starship
-        cp ./terminal/starship.toml ~/.config/starship/starship.toml
+        cp ./terminal/starship.toml ~/.config/starship.toml
         
         # Check if icon parameter is provided
         if [ ! -z "$icon" ]; then
             echo "Adding icon [$icon](bg:color_purple fg:color_white) to starship.toml..."
-            sed -i "5i\icon = \"$icon\"" ~/.config/starship/starship.toml
+            sed -i "5i\icon = \"$icon\"" ~/.config/starship.toml
         fi
 
     else