feat: load remote catalogs with remoteLoader()

[semoal]

This new feature opens a whole world for loading the messages:

Now you could perfectly store your .json, .po, or even .csv files of Lingui in remote environments like an AWS S3, and recover them dynamically.

Basically now you could so something similar to this:

import { i18n } from "@lingui/core"
import { remoteLoader } from "@lingui/loader"

export async function remoteActive(locale: string) {
  const remoteMessages = await fetch(`https://some-api/${locale}/messages`)
  const compiledMessages = remoteLoader(locale, remoteMessages)
  i18n.load(locale, compiledMessages)
  i18n.activate(locale)
}

How does this handle fallbacks?

You can perfectly pass a fallback messages object, it can be a .json file or even a .po file.

import { i18n } from "@lingui/core"
import { remoteLoader } from "@lingui/loader"

import { messages as fallbackMessages } from "./locales/en/messages"

export async function remoteActive(locale: string) {
  const remoteMessages = await fetch(`https://some-api/${locale}/messages`)
  const compiledMessages = remoteLoader(locale, remoteMessages, fallbackMessages)
  i18n.load(locale, compiledMessages)
  i18n.activate(locale)
}

There's pending to write documentation of this, I'll push the documentation along the week since I'm not sure if this will 100% work great

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[github-actions]

size-limit report 📦

Path	Size
./packages/core/build/cjs/core.production.min.js	2.78 KB (0%)
./packages/detect-locale/build/cjs/detect-locale.production.min.js	798 B (0%)
./packages/react/build/cjs/react.production.min.js	4.85 KB (0%)
./packages/core/build/esm/index.js	2.75 KB (0%)
./packages/core/build/esm/dev.js	7.01 KB (0%)
./packages/detect-locale/build/esm/index.js	852 B (0%)
./packages/react/build/esm/index.js	4.83 KB (0%)