feat: I18n (#1653)

* feat: i18n

* Changing language single source of truth from TEAM to USER

* Changes according to @tommoor comments on PR

* Changed package.json for build:i18n and translation label

* Finished 1st MVP of i18n for outline

* new translation labels & Portuguese from Portugal translation

* Fixes from PR request

* Described language dropdown as an experimental feature

* Set keySeparator to false in order to cowork with html keys

* Added useTranslation to Breadcrumb

* Repositioned <strong> element

* Removed extra space from TemplatesMenu

* Fortified the test suite for i18n

* Fixed trans component problematic

* Check if selected language is available

* Update yarn.lock

* Removed unused Trans

* Removing debug variable from i18n init

* Removed debug variable

* test: update snapshots

* flow: Remove decorator usage to get proper flow typing
It's a shame, but hopefully we'll move to Typescript in the next 6 months and we can forget this whole Flow mistake ever happened

* translate: Drafts

* More translatable strings

* Mo translation strings

* translation: Search

* async translations loading

* cache translations in client

* Revert "cache translations in client"

This reverts commit 08fb61ce36384ff90a704faffe4761eccfb76da1.

* Revert localStorage cache for cache headers

* Update Crowdin configuration file

* Moved translation files to locales folder and fixed english text

* Added CONTRIBUTING File for CrowdIn

* chore: Move translations again to please CrowdIn

* fix: loading paths
chore: Add strings for editor

* fix: Improve validation on documents.import endpoint

* test: mock bull

* fix: Unknown mimetype should fallback to Markdown parsing if markdown extension (#1678)

* closes #1675

* Update CONTRIBUTING

* chore: Add link to translation portal from app UI

* refactor: Centralize language config

* fix: Ensure creation of i18n directory in build

* feat: Add language prompt

* chore: Improve contributing guidelines, add link from README

* chore: Normalize tab header casing

* chore: More string externalization

* fix: Language prompt in dark mode

Co-authored-by: André Glatzl <andreglatzl@gmail.com>

app/components/IconPicker.js

@@ -22,6 +22,7 @@ import {
   VehicleIcon,
 } from "outline-icons";
 import * as React from "react";
+import { withTranslation, type TFunction } from "react-i18next";
 import styled from "styled-components";
 import { DropdownMenu } from "components/DropdownMenu";
 import Flex from "components/Flex";
@@ -126,6 +127,7 @@ type Props = {
   onChange: (color: string, icon: string) => void,
   icon: string,
   color: string,
+  t: TFunction,
 };
 
 function preventEventBubble(event) {
@@ -167,12 +169,13 @@ class IconPicker extends React.Component<Props> {
   };
 
   render() {
+    const { t } = this.props;
     const Component = icons[this.props.icon || "collection"].component;
 
     return (
       <Wrapper ref={(ref) => (this.node = ref)}>
         <label>
-          <LabelText>Icon</LabelText>
+          <LabelText>{t("Icon")}</LabelText>
         </label>
         <DropdownMenu
           onOpen={this.handleOpen}
@@ -197,7 +200,7 @@ class IconPicker extends React.Component<Props> {
             })}
           </Icons>
           <Flex onClick={preventEventBubble}>
-            <React.Suspense fallback={<Loading>Loading…</Loading>}>
+            <React.Suspense fallback={<Loading>{t("Loading…")}</Loading>}>
               <ColorPicker
                 color={this.props.color}
                 onChange={(color) =>
@@ -246,4 +249,4 @@ const Wrapper = styled("div")`
   position: relative;
 `;
 
-export default IconPicker;
+export default withTranslation()<IconPicker>(IconPicker);