Adapt install script with new fish architecture

Install/fish-custom

@@ -2,6 +2,6 @@
 
 # Install fish customization
 
-mkdir -p /home/jovian/.config/fish/functions
-cp ./Templates/fish_prompt.fish /home/jovian/.config/fish/functions/
+mkdir -p /home/jovian/.config/fish
+cp -r ./Templates/fish/* /home/jovian/.config/fish/