feat: add fs tools (#59)

tools/fs_mkdir.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -e
+
+# @describe Create a new directory at the specified path.
+
+# @env FS_BASE_DIR=. The base dir
+# @option --path! The path of the directory to create
+
+main() {
+    path="$FS_BASE_DIR/$argc_path"
+    mkdir -p "$path"
+    echo "Directory created: $path"
+}
+
+eval "$(argc --argc-eval "$0" "$@")"