Add a script to generate unreleased changelog (#10988)

* Add script to generate changelog

* Fix by prettier

* Use CHANGELOG_CATEGORIES from utils

* Fix filename

* Fix typo

* Add comments

* Replace codeblock

* Fix typo

* Avoid to use top-level await

* Use enquirer

* Address review

* Use meriyah for mjs

* Add comment

* Update usase comment

* Update CONTRIBUTING.md

scripts/utils/changelog-categories.mjs

@@ -0,0 +1,20 @@
+export const CHANGELOG_CATEGORIES = [
+  "angular",
+  "api",
+  "cli",
+  "css",
+  "flow",
+  "graphql",
+  "handlebars",
+  "html",
+  "javascript",
+  "json",
+  "less",
+  "lwc",
+  "markdown",
+  "mdx",
+  "scss",
+  "typescript",
+  "vue",
+  "yaml",
+];