chore: add husky hook for commitlint

Author: cwillisf

.husky/.gitattributes

@@ -0,0 +1 @@
+* text eol=lf

.husky/commit-msg

@@ -0,0 +1,4 @@
+#!/usr/bin/env sh
+. "$(dirname -- "$0")/_/husky.sh"
+
+npx --no-install commitlint --edit "$1"

package-lock.json

@@ -7,6 +7,7 @@
     "build": "npm run clean && webpack --colors --bail",
     "clean": "rimraf ./build && mkdirp build && rimraf ./dist && mkdirp dist",
     "deploy": "touch build/.nojekyll && gh-pages -t -d build -m \"[skip ci] Build for $(git log --pretty=format:%H -n1)\"",
+    "prepare": "husky install",
     "prune": "./prune-gh-pages.sh",
     "i18n:push": "tx-push-src scratch-editor interface translations/en.json",
     "i18n:src": "rimraf ./translations/messages/src && babel src > tmp.js && rimraf tmp.js && build-i18n-src ./translations/messages/src ./translations/ && npm run i18n:push",
@@ -117,6 +118,7 @@
     "eslint-plugin-react": "7.24.0",
     "gh-pages": "3.2.3",
     "html-webpack-plugin": "3.2.0",
+    "husky": "8.0.1",
     "jest": "21.2.1",
     "jest-junit": "7.0.0",
     "mkdirp": "1.0.3",