Split translations between EW and shared components (#31441)

* Split translations between EW and shared components

Uses update module API with global TranslationKey type that can be
overridden.

WIP.

* Removed the wrong script (for now)

* Add the type files

* Add shared components i18n file

* More i18n strings

* Add i18n check for shared conmponents

* Needs a different name

* rerun i18n for merge from develop, fix test

* Move translated strings to shared components file

NB. there are lots of removed strings for a few languages where we
seem to have hit a localazy bug or something where the key/value
for plurals got switched, making the translations invalid. They've
been missing for a while so I'm removing them rather than trying to
restore them,

* Add shared components files to localazy

* Merge element web & shared component translations

for the built app

* Use right translations for shared component tests

and fix missign en_EN strings

* Pull shared components translations too

* Fix/disable warnings

* We can now remove the build:res call

...right? (right?)

* Remove webpack import for languages index

..and just load it using a relative path which we do for the individual
language files and also did anyway for the index because even in non-test
it was an object, not a string, so we always usesd the 'test' code path.

* Make the storybook language selector work

...without referring to the parent app's files

* Revert unnecessary yarn lock change

* Typo

Co-authored-by: Michael Telatynski <7t3chguy@gmail.com>

* Add comment on why we use merge

* Fix localazy download config

to actually put the translations in the right place

* Better typescript syntax

Co-authored-by: Michael Telatynski <7t3chguy@gmail.com>

* Watch both translations files

---------

Co-authored-by: Michael Telatynski <7t3chguy@gmail.com>

packages/shared-components/package.json

@@ -34,8 +34,11 @@
         "package.json"
     ],
     "scripts": {
+        "i18n": "matrix-gen-i18n src && yarn i18n:sort && yarn i18n:lint",
+        "i18n:sort": "jq --sort-keys '.' src/i18n/strings/en_EN.json > src/i18n/strings/en_EN.json.tmp && mv src/i18n/strings/en_EN.json.tmp src/i18n/strings/en_EN.json",
+        "i18n:lint": "matrix-i18n-lint && prettier --log-level=silent --write src/i18n/strings/ --ignore-path /dev/null",
         "test": "jest",
-        "prepare": "patch-package && yarn --cwd ../.. build:res && node scripts/gatherTranslationKeys.ts && vite build",
+        "prepare": "patch-package && vite build",
         "storybook": "storybook dev -p 6007",
         "build-storybook": "storybook build",
         "lint": "yarn lint:types && yarn lint:js",