docs: move gendocs tool to dagger/dagger

Signed-off-by: Andrea Luzzardi <aluzzardi@gmail.com>

tools/gendocs/src/@rocketseat/gatsby-theme-docs/util/slug.js

@@ -0,0 +1,11 @@
+export default function slugify(string) {
+  return string
+    .toString() // Cast to string
+    .toLowerCase() // Convert the string to lowercase letters
+    .trim() // Remove whitespace from both sides of a string
+    .replace(/\s/g, '-') // Replace each space with -
+    .replace(
+      /[^\w\-\u00b4\u00C0-\u00C3\u00c7\u00C9-\u00CA\u00CD\u00D3-\u00D5\u00DA\u00E0-\u00E3\u00E7\u00E9-\u00EA\u00ED\u00F3-\u00F5\u00FA]+/g,
+      '',
+    ); // Removes all chars that aren't words, -, ´ or some latin characters (À Á Â Ã Ç É Ê Í Ó Ô Õ Ú à á â ã ç é ê í ó ô õ ú)
+}