ci: add e2e tests with cypress

* Creates E2E tests using Cypress and includes two tests

* Improves yarn.lock file

* Includes documentation

* Cypress project id

* test e2e w/ ci and video

* run unit command before e2e

* Also cache cypress

* Persist cypress to next build step

* Try a different path

* Try without working dir

* Persist less data, but restore yarn/cypress cache in next step

* Install cypress to invalidate cache

* Add e2e as a blocker for merged publishing

.eslintrc

@@ -1,16 +1,18 @@
 {
-  "extends": [
-    "react-app",
-    "eslint:recommended",
-    "plugin:react/recommended"
-  ],
+  "extends": ["react-app", "eslint:recommended", "plugin:react/recommended"],
   "parser": "babel-eslint",
   "env": {
     "jest": true
   },
   "settings": {
     "react": {
-      "version": "detect",
-    },
+      "version": "detect"
+    }
   },
+  "globals": {
+    "cy": true,
+    "context": true,
+    "Cypress": true,
+    "assert": true
+  }
 }