refactor: organise TypeScript config and migrate helpers (#44747)

* feat: allow more 1000 steps to be created at once

* refactor: start migrating to typescript

* refactor: delete-step to ts

* refactor: migrated some helpers

* refactor: migrate create-empty-steps

* refactor: migrate create-step-between

* refactor: finish migrating to TS

* refactor: migrate tests

* fix: ensure mock.restore is done after each test

* fix: prevent double-tscing

* fix: repair the tests

* chore: use ts-node for scripts

We don't need the performance boost of incremental compilation and
ts-node is easier to work with

* refactor: consolidate tsconfigs

* refactor: replace gulp

* fix: use ts-node for build-curriculum

* fix: allow ts compilation of config

* feat: create and use create:config script

* fix: add /config to eslint projects

* fix: remove gulp script

.github/workflows/cypress.yml

@@ -113,7 +113,7 @@ jobs:
       - name: Install and Build
         run: |
           npm ci
-          npm run ensure-env
+          npm run create:config
           npm run build:curriculum
           npm run build:server
 

.github/workflows/node.js-tests-upcoming.yml

@@ -39,7 +39,7 @@ jobs:
       - name: Lint Source Files
         run: |
           npm ci
-          npm run ensure-env
+          npm run create:config
           npm run build:curriculum
           npm run lint
 
@@ -73,7 +73,7 @@ jobs:
       - name: Install Dependencies
         run: |
           npm ci
-          npm run ensure-env
+          npm run create:config
           npm run build:curriculum
 
       - name: Run Tests

.github/workflows/node.js-tests.yml

@@ -33,7 +33,7 @@ jobs:
       - name: Lint Source Files
         run: |
           npm ci
-          npm run ensure-env
+          npm run create:config
           npm run build:curriculum
           npm run lint
 
@@ -66,7 +66,7 @@ jobs:
       - name: Install Dependencies
         run: |
           npm ci
-          npm run ensure-env
+          npm run create:config
           npm run build:curriculum
 
       - name: Run Tests
@@ -102,7 +102,7 @@ jobs:
       - name: Install Dependencies
         run: |
           npm ci
-          npm run ensure-env
+          npm run create:config
           npm run build:curriculum
 
       - name: Run Tests
@@ -142,7 +142,7 @@ jobs:
           CLIENT_LOCALE: ${{ matrix.locale }}
         run: |
           npm ci
-          npm run ensure-env
+          npm run create:config
           npm run build:curriculum
 
       - name: Run Tests