added a function to easily generate ssh key

functions/sshkey.fish

@@ -0,0 +1,16 @@
+function sshkey --description "generate a SSH key"
+    if test (count $argv) -ne 1
+        echo "Usage: sshkey <file>"
+        echo "example: sshkey ~/.ssh/your_key_name"
+        return 1
+    end
+
+    set file $argv[1]
+
+    if test -e "$file"
+        echo "Error: $file already exists."
+        return 1
+    end
+
+    ssh-keygen -t ed25519 -f "$file" -C "$(hostname)" -N ""
+end