chore: Add Husky/lint-staged for local precommit

Author: nschonni

.husky/pre-commit

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

.lintstagedrc.json

@@ -0,0 +1,4 @@
+{
+  "*": "prettier --ignore-unknown --write",
+  "*.md": "markdownlint-cli2-fix"
+}

package.json

@@ -16,13 +16,16 @@
     "lint:json": "prettier -c \"**/*.json(c)?\"",
     "lint:md": "markdownlint-cli2 \"**/*.md\"",
     "lint:yml": "prettier -c \"**/*.yml\"",
+    "prepare": "husky install",
     "start": "yarn up-to-date-check && env-cmd --silent cross-env CONTENT_ROOT=files REACT_APP_DISABLE_AUTH=true BUILD_OUT_ROOT=build yari-server",
     "up-to-date-check": "node scripts/up-to-date-check.js"
   },
   "dependencies": {
     "@mdn/yari": "1.18.23",
     "cross-env": "7.0.3",
     "env-cmd": "10.1.0",
+    "husky": "8.0.1",
+    "lint-staged": "13.0.3",
     "markdownlint-cli2": "0.5.1",
     "markdownlint-rule-search-replace": "1.0.5",
     "prettier": "2.7.1"