feet: [BD-26] Add support for special exams (#435)

* feat: add packages dir to .gitignore

* Investigate exam redirect (#2)

* feat: remove exam redirect

* feat: take control over exam instructions

* refactor: use fedx code structure

* fix: remove debug logging, remove redirect check

Co-authored-by: Vladas Tamoshaitis <vladas.tamoshaitis@raccoongang.com>

* Add state and reducer for check microfrontend_special_exams waffle flag (#4)

* feat: add state and reducer for check microfrontend_special_exams waffle flag

* fix: rename special exams enabled flag

* fix: rename reducer for setting special exams enabled flag

* refactor: timer feature

* feat(tests): extend tests + fix failing ones, fix quality

* fix: revert removing package lock file

Co-authored-by: Vladas Tamoshaitis <vladas.tamoshaitis@raccoongang.com>

* fix: naming of waffle flag helpers to reflect relation with mfe

* fix: change naming of the waffle flag

* fix: revert remove package lock file

* feat: switch to @edx npm package

* fix: Remove redundant references from .gitignore

* fix: add is_mfe_special_exams_enabled to courseMetadata.factory.js

* fix: fix tests for 'Sequence' content wrapped in 'SequenceExamWrapper'

Co-authored-by: Sagirov Eugeniy <sagirov19@gmail.com>
Co-authored-by: Vladas Tamoshaitis <vladas.tamoshaitis@raccoongang.com>
Co-authored-by: Sagirov Evgeniy <34642612+UvgenGen@users.noreply.github.com>
Co-authored-by: Igor Degtiarov <igor.degtiarov@raccoongang.com>

package.json

@@ -38,6 +38,7 @@
     "@edx/brand": "npm:@edx/brand-openedx@1.1.0",
     "@edx/frontend-component-footer": "10.1.4",
     "@edx/frontend-enterprise": "4.2.3",
+    "@edx/frontend-lib-special-exams": "^1.0.0",
     "@edx/frontend-platform": "1.10.2",
     "@edx/paragon": "14.8.0",
     "@fortawesome/fontawesome-svg-core": "1.2.34",