feat: update fish configuration

Author: 1995parham

fish/conf.d/greeting.fish

@@ -0,0 +1,4 @@
+function fish_greeting
+    echo "Hello 🐼!"
+    echo "Sometimes when you're in a dark place you think you've been buried, but you've actually been planted."
+end

scripts/fish.sh

@@ -31,8 +31,5 @@ main() {
     grep "fish" /etc/shells || which fish | sudo tee -a /etc/shells
 
     configfile "fish" "config.fish"
-}
-
-main_elahe() {
-    configfile "fish/conf.d" "smapp.fish"
+    configfile "fish/conf.d" "greeting.fish"
 }