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

tools/challenge-helper-scripts/helpers/get-arg-values.ts

@@ -0,0 +1,15 @@
+// Creates an object with the values starting at the third position of argv,
+// ['lorem', 'ipsum', 'one=1', 'two=2', ...] => { one: 1, two: 2, ...}
+function getArgValues(argv: string[] = []): Record<string, string> {
+  return argv.slice(2).reduce((argsObj, arg) => {
+    const [argument, value] = arg.replace(/\s/g, '').split('=');
+
+    if (!argument || !value) {
+      throw `Invalid argument/value specified: ${arg}`;
+    }
+
+    return { ...argsObj, [argument]: value };
+  }, {});
+}
+
+export { getArgValues };