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>

index.js

@@ -11,6 +11,10 @@ const path                              = require('path')
 const semver                            = require('semver')
 const { pathToFileURL }                 = require('url')
 const { AZURE_CLIENT_ID, MSFT_OPCODE, MSFT_REPLY_TYPE, MSFT_ERROR, SHELL_OPCODE } = require('./app/assets/js/ipcconstants')
+const LangLoader                        = require('./app/assets/js/langloader')
+
+// Setup Lang
+LangLoader.setupLanguage()
 
 // Setup auto updater.
 function initAutoUpdater(event, data) {
@@ -236,7 +240,11 @@ function createWindow() {
     })
     remoteMain.enable(win.webContents)
 
-    ejse.data('bkid', Math.floor((Math.random() * fs.readdirSync(path.join(__dirname, 'app', 'assets', 'images', 'backgrounds')).length)))
+    const data = {
+        bkid: Math.floor((Math.random() * fs.readdirSync(path.join(__dirname, 'app', 'assets', 'images', 'backgrounds')).length)),
+        lang: (str, placeHolders) => LangLoader.queryEJS(str, placeHolders)
+    }
+    Object.entries(data).forEach(([key, val]) => ejse.data(key, val))
 
     win.loadURL(pathToFileURL(path.join(__dirname, 'app', 'app.ejs')).toString())