utils upgrade

utils/.local/bin/mkcd

@@ -1,4 +1,21 @@
 #!/usr/bin/env bash
+set -eo pipefail
+
+if [[ "$1" == "-h" || "$1" == "--help" ]]; then
+    cat <<EOF
+Usage: $(basename "$0") [-h] <directory>
+
+Create directory and change to it.
+
+Options:
+    -h, --help    Show this help message
+
+Arguments:
+    directory     Directory to create and enter
+
+EOF
+    exit 0
+fi
 
 mkdir -p "$1"
-cd "$1" || exit
+cd "$1" || false