feat: mvp features for soft launch (#44539)

* refactor: use enum

* feat: create links between legacy and new

* refactor: pull out legacy-links component

* fix: import order

* fix: provide icon for new superblock

* feat: only show the copy on the new superblock

* fix: use the proper i18n keys correctly

* feat: put the new superblock at the end of the map

* feat: update the new superblock title

* test: update for soft launch order

* fix: show original project links on /settings

Soft launch only.

* test: use SHOW_NEW_CURRICULUM in tests

* fix: rename the remaining rwd-22s

* feat: make the messge prettier

* fix: message copy

* refactor: make comment make sense

Co-authored-by: Ahmad Abdolsaheb <ahmad.abdolsaheb@gmail.com>
Co-authored-by: Nicholas Carrigan (he/him) <nhcarrigan@gmail.com>

curriculum/test/test-challenges.js

@@ -274,10 +274,17 @@ function populateTestsForLang({ lang, challenges, meta }) {
         return;
       }
       it(`${superBlock} should have the same order in every meta`, function () {
-        const firstOrder = getSuperOrder(filteredMeta[0].superBlock);
+        const firstOrder = getSuperOrder(filteredMeta[0].superBlock, {
+          showNewCurriculum: process.env.SHOW_NEW_CURRICULUM
+        });
         assert.isNumber(firstOrder);
         assert.isTrue(
-          filteredMeta.every(el => getSuperOrder(el.superBlock) === firstOrder),
+          filteredMeta.every(
+            el =>
+              getSuperOrder(el.superBlock, {
+                showNewCurriculum: process.env.SHOW_NEW_CURRICULUM
+              }) === firstOrder
+          ),
           'The superOrder properties are mismatched.'
         );
       });