Localize HeliosLauncher UI using lang files (#301)

* First step to use Language .json file in ejs

* i18n for landing.ejs

* i18n for login.ejs

* i18n for loginOptions.ejs

* i18n for overlay.ejs

* i18n for settings.ejs

* i18n for waiting.ejs

* i18n for welcome.ejs

* langloader.js placeholder support

* i18n for landing.js

* i18n for login.js

* i18n for overlay.js

* i18n for settings.js

* i18n for uibinder.js

* i18n for uicore.js

* remove html language replacement

* use toml for i18n

* Fix mojang/microsoft status icon is undefined

* cascadable langloader

* separate lang file for customization

* move some placeholder text to _placeholder.toml

* Update

* Reduce package lock diff.

* Remove another placeholder.

* Checkbox does not require translation.

* Icons don't need translation.

* Leave placeholders inline.

* Fix translation for news pages.

* Remove more unneeded translations.

---------

Co-authored-by: Daniel Scalzi <d_scalzi@yahoo.com>

app/assets/js/scripts/uicore.js

@@ -10,6 +10,7 @@ const {ipcRenderer, shell, webFrame} = require('electron')
 const remote                         = require('@electron/remote')
 const isDev                          = require('./assets/js/isdev')
 const { LoggerUtil }                 = require('helios-core')
+const Lang                           = require('./assets/js/langloader')
 
 const loggerUICore             = LoggerUtil.getLogger('UICore')
 const loggerAutoUpdater        = LoggerUtil.getLogger('AutoUpdater')
@@ -42,7 +43,7 @@ if(!isDev){
         switch(arg){
             case 'checking-for-update':
                 loggerAutoUpdater.info('Checking for update..')
-                settingsUpdateButtonStatus('Checking for Updates..', true)
+                settingsUpdateButtonStatus(Lang.queryJS('uicore.autoUpdate.checkingForUpdateButton'), true)
                 break
             case 'update-available':
                 loggerAutoUpdater.info('New update available', info.version)
@@ -56,7 +57,7 @@ if(!isDev){
                 break
             case 'update-downloaded':
                 loggerAutoUpdater.info('Update ' + info.version + ' ready to be installed.')
-                settingsUpdateButtonStatus('Install Now', false, () => {
+                settingsUpdateButtonStatus(Lang.queryJS('uicore.autoUpdate.installNowButton'), false, () => {
                     if(!isDev){
                         ipcRenderer.send('autoUpdateAction', 'installUpdateNow')
                     }
@@ -65,7 +66,7 @@ if(!isDev){
                 break
             case 'update-not-available':
                 loggerAutoUpdater.info('No new update found.')
-                settingsUpdateButtonStatus('Check for Updates')
+                settingsUpdateButtonStatus(Lang.queryJS('uicore.autoUpdate.checkForUpdatesButton'))
                 break
             case 'ready':
                 updateCheckListener = setInterval(() => {