Feature/enforce license notice in each file via eslint rule (#304)

* [ESLint] Add "eslint-plugin-header" as dev dependency

* [ESLint::eslint-plugin-header] Setup rule

* [ESLint::eslint-plugin-header] Fix errors

package.json

@@ -62,6 +62,7 @@
     "eslint-config-airbnb": "^19.0.4",
     "eslint-config-airbnb-typescript": "^17.0.0",
     "eslint-config-prettier": "^8.6.0",
+    "eslint-plugin-header": "^3.1.1",
     "eslint-plugin-import": "^2.27.5",
     "eslint-plugin-jsx-a11y": "^6.7.1",
     "eslint-plugin-no-relative-import-paths": "^1.5.2",