fix: re-revert the API decoupling (#41263)

* fix(api): decouple api from curriculum

This reverts commit 8f0e441644 and
introduces the implementations from #40703.

* fix(gitpod): add curriculum build to GitPod

This reverts commit 706d70f58d and
introduces implementations from #41234.

* docs: update DevOps manual for api change (#41259)

Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

config/i18n/all-langs.js

@@ -0,0 +1,41 @@
+/* An error will be thrown if the CLIENT_LOCALE and CURRICULUM_LOCALE variables
+ * from the .env file aren't found in their respective arrays below
+ */
+const availableLangs = {
+  client: ['english', 'espanol', 'chinese'],
+  curriculum: ['english', 'espanol', 'chinese']
+};
+
+// Each client language needs an entry in the rest of the variables below
+
+/* These strings set the i18next language. It needs to be the two character
+ * string for the language to take advantage of available functionality.
+ * Use a 639-1 code here https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes
+ */
+const i18nextCodes = {
+  english: 'en',
+  espanol: 'es',
+  chinese: 'zh'
+};
+
+// These are for the language selector dropdown menu in the footer
+const langDisplayNames = {
+  english: 'English',
+  espanol: 'Español',
+  chinese: '中文'
+};
+
+/* These are for formatting dates and numbers. Used with JS .toLocaleString().
+ * There's an example in profile/components/Camper.js
+ * List: https://github.com/unicode-cldr/cldr-dates-modern/tree/master/main
+ */
+const langCodes = {
+  english: 'en-US',
+  espanol: 'es-419',
+  chinese: 'zh'
+};
+
+exports.availableLangs = availableLangs;
+exports.i18nextCodes = i18nextCodes;
+exports.langDisplayNames = langDisplayNames;
+exports.langCodes = langCodes;