feat: declarative i18n [LIBS-154]

[amcgee]

WORK IN PROGRESS

Proposed implementation of LIBS-154

This change will:

• support building i18n locales as separate exports of platform-built library (i.e. @dhis2/ui-widgets/d2-i18n/fr.locale.json) with appropriate exports declaration in package.json
• implement logic for collecting locale strings from dependencies
• generate i18n js modules into shell, rather than into app source
• Add initialization and loading logic to app-adapter, including bundle-split locale modules and dynamically loaded (import()) strings per language (rather than including all strings in the main app bundle), including also the moment locale for a given locale
• Use package validation and a codemod to remove generated sources from /src in apps and libs, update all ./locales/index.js and @dhis2/d2-i18n imports in the codebase, and correct package.json, .gitignore, and other config files as much as possible

[stale]

Hi!

Due to a lack of activity on this issue over time (180 days) it seems to be stale. If still relevant, please provide information that moves it forward, e.g. additional information, a pull request with suggested changes, or a reason to keep it open.

Any activity will keep it open, otherwise it will be closed automatically in 30 days. Thanks! 🤖

[stale]

Hi!

Due to a lack of activity on this issue over time (180 days) it seems to be stale. If still relevant, please provide information that moves it forward, e.g. additional information, a pull request with suggested changes, or a reason to keep it open.

Any activity will keep it open, otherwise it will be closed automatically in 30 days. Thanks! 🤖