Internationalization & localization (#1822)

* install and setup lingui

* setup dynamic locale activation and async loading

* first pass of automated replacement of text messages

* add some more documentaton

* fix nits

* add `es` and `hi`locales for testing purposes

* make accessibilityLabel localized

* compile and extract new messages

* fix merge conflicts

* fix eslint warning

* change instructions from sending email to opening PR

* fix comments

src/locale/i18n.ts

@@ -0,0 +1,20 @@
+import {i18n} from '@lingui/core'
+
+export const locales = {
+  en: 'English',
+  cs: 'Česky',
+  fr: 'Français',
+  hi: 'हिंदी',
+  es: 'Español',
+}
+export const defaultLocale = 'en'
+
+/**
+ * We do a dynamic import of just the catalog that we need
+ * @param locale any locale string
+ */
+export async function dynamicActivate(locale: string) {
+  const {messages} = await import(`./locales/${locale}/messages`)
+  i18n.load(locale, messages)
+  i18n.activate(locale)
+}