Add husky setup and first pre-commit hook

This adds basic linting to yaml and json files.

Bug: T300893

.husky/pre-commit

@@ -0,0 +1,4 @@
+#!/bin/sh
+. "$(dirname "$0")/_/husky.sh"
+
+npx lint-staged

.prettierignore

@@ -0,0 +1,9 @@
+package-lock.json
+
+# Ignore all files covered by a wikimedia code style:
+*.js
+*.ts
+*.vue
+*.scss
+*.css
+*.less

.prettierrc.js

@@ -0,0 +1,7 @@
+/*
+	This will be used for file-types to which Wikimedia linting does not apply, such as json or yaml
+ */
+module.exports = {
+	useTabs: true, // does not apply to yaml as that format cant use tabs
+	tabWidth: 4, // applies defacto only to yaml
+};