setup prettier and eslint (changelog ignore)

package.json

@@ -15,12 +15,31 @@
         "test": "node dist/test/bin/main && node dist/test/lib",
         "copy-files": "copyfiles -u 1 src/**/*.ftl src/**/*.xml src/**/*.js dist/",
         "generate-messages": "node dist/bin/generate-i18n-messages.js",
-        "link_in_test_app": "node dist/bin/link_in_test_app.js"
+        "link_in_test_app": "node dist/bin/link_in_test_app.js",
+        "lint:check": "eslint . --ext .ts,.tsx",
+        "lint": "yarn lint:check --fix",
+        "_format": "prettier '**/*.{ts,tsx,json,md}'",
+        "format": "yarn _format --write",
+        "format:check": "yarn _format --list-different",
+        "yarn_link": "ts-node src/bin/yarn_link.ts"
     },
     "bin": {
         "build-keycloak-theme": "dist/bin/build-keycloak-theme/index.js",
         "download-builtin-keycloak-theme": "dist/bin/download-builtin-keycloak-theme.js"
     },
+    "lint-staged": {
+        "*.{ts,tsx}": [
+            "eslint --fix"
+        ],
+        "*.{ts,tsx,json,md}": [
+            "prettier --write"
+        ]
+    },
+    "husky": {
+        "hooks": {
+            "pre-commit": "lint-staged -v"
+        }
+    },
     "author": "u/garronej",
     "license": "MIT",
     "files": [
@@ -48,7 +67,13 @@
         "properties-parser": "^0.3.1",
         "react": "^17.0.1",
         "rimraf": "^3.0.2",
-        "typescript": "^4.2.3"
+        "typescript": "^4.2.3",
+        "@typescript-eslint/eslint-plugin": "^4.24.0",
+        "@typescript-eslint/parser": "^4.24.0",
+        "eslint": "^7.26.0",
+        "eslint-config-prettier": "^8.3.0",
+        "husky": "^4.3.8",
+        "lint-staged": "^11.0.0"
     },
     "dependencies": {
         "@emotion/react": "^11.4.1",