chore: allow different casing in middleware names in template

_templates/middleware/new/prompt.js

@@ -1,10 +1,24 @@
+const uppercase = new RegExp("([A-Z])", "g");
+const underbar_prefix = new RegExp("^_");
+
+function replaceAll(str, subStrs, by) {
+  let result = str;
+  for (const subStr of subStrs) {
+    result = result.split(subStr).join(by);
+  }
+  return result;
+}
+
+function underscore(str) {
+  return replaceAll(str.replace(uppercase, "_$1"), ["-", " "], "_");
+}
+
 module.exports = [
   {
     type: "input",
     name: "name",
-    message:
-      "How do you want to call the middleware? Please separate with spaces, e. g. 'no sniff'",
-    result: (name) => name.toLowerCase(),
+    message: "How do you want to call the middleware?",
+    result: (name) => underscore(name),
   },
   {
     type: "input",