Make sure that catalog values are properly updated

[arsalansufi]

Overview

Noticed a quirk in app string catalog generation. While the new catalog generation logic handles the addition and removal of strings to app_strings.tsx, it doesn't handle updates to existing strings.

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So imagine we have the following in app_strings.tsx:

buttonDone: () => <UiString uiStringKey="buttonDone">Done</UiString>,

The catalog will contain:

"buttonDone": "Done",

If we then edit app_strings.tsx, e.g.:

buttonDone: () => <UiString uiStringKey="buttonDone">Done!</UiString>,

The catalog should read:

"buttonDone": "Done!",

But it'll currently remain unchanged.

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This PR addresses this gap with a config tweak. The relevant config field is a bit abstractly named. But you can see how it does what we want by following this issue to its conclusion: i18next/i18next-parser#267 ➡️ i18next/i18next-parser#451.

Testing Plan

• Tested manually

[kofi-q]

Good catch!