feat: migrate unit tests to Jest (#6353)

* config(jest): updated setup
* config(jest): update testMatch to include jsx files
* config(jest): add transformIgnorePatterns
* config(jest): update ignore files that do not work in jest yet
* config: add test:unit-jest to test script

* fix(jest): lint with eslint-plugin-jest

* refactor(jest): move unit test directory
* refactor(mocha): restore mocha tests that fail in jest

* docs(jest): update helpful scripts with test:unit-jest

.eslintrc

@@ -4,6 +4,7 @@ env:
   node: true
   es6: true
   jest: true
+  jest/globals: true
 parserOptions:
   ecmaFeatures:
     jsx: true
@@ -14,6 +15,7 @@ plugins:
   - react
   - mocha
   - import
+  - jest
 settings:
   react:
     pragma: React