added if condition for exa/eza/ls

fish/.config/fish/config.fish

@@ -4,9 +4,20 @@ end
 
 # Custom aliases
 alias cat='bat --style changes,numbers'
+if test -f /usr/bin/exa
+    alias ls='exa'
+    alias ll='exa -bgla'
+    alias la='exa -bgla'
+else if test -f /usr/bin/eza
     alias ls='eza'
     alias ll='eza -bgla'
     alias la='eza -bgla'
+else
+    alias ls='ls'
+    alias ll='ls -bgla'
+    alias la='ls -bgla'
+end
+    
 alias docker-compose-update 'docker compose down && docker compose pull && docker compose up -d'
 alias vim='nvim'
 #alias clear='command clear; task limit:5 next; echo ""; echo ""'