new: [0km] make ``vps-setup`` support ``ed25519`` ssh keys

bin/0km

@@ -954,11 +954,14 @@ cmdline.spec::cmd:vps-setup:run() {
         fi
     fi
 
+    SUPPORTED_KEY_TYPE=(ssh-rsa ssh-ed25519)
     Section Checking access
     while read-0 key; do
         prefix="${key%% *}"
-        if [ "$prefix" != "ssh-rsa" ]; then
+        if ! [[ " ${SUPPORTED_KEY_TYPE[*]} " == *" $prefix "* ]]; then
             err "Unsupported key:"$'\n'"$key"
+            echo "  Please use only key of the following type:" >&2
+            printf "    - %s\n" "${SUPPORTED_KEY_TYPE[@]}" >&2
             return 1
         fi
         label="${key##* }"