Select the installer language before wifi menu

The wifi menu was always shown in English, even though translations
exist. This is because it's launched before the main menu, and the user
has no chance to select the archinstall language.

Now there's a language selection menu before the internet connection
check.

Author: acuteenvy

archinstall/lib/general/general_menu.py

@@ -107,7 +107,8 @@ async def select_archinstall_language(languages: list[Language], preset: Languag
 
 	title = 'NOTE: Console font will be set automatically for supported languages.\n'
 	title += 'For other languages, fonts can be found in "/usr/share/kbd/consolefonts"\n'
-	title += 'and set manually with: setfont <fontname>\n'
+	title += 'and set manually with: setfont <fontname>\n\n'
+	title += 'Select the archinstall language'
 
 	result = await Selection[Language](
 		header=title,

archinstall/main.py

@@ -7,19 +7,21 @@
 import time
 import traceback
 from pathlib import Path
+from typing import override
 
 from archinstall.lib.args import ArchConfigHandler, SubCommand
 from archinstall.lib.disk.utils import disk_layouts
+from archinstall.lib.general.general_menu import select_archinstall_language
 from archinstall.lib.hardware import SysInfo
 from archinstall.lib.log import debug, error, info, logger, share_install_log, warn
 from archinstall.lib.menu.helpers import Confirmation
 from archinstall.lib.network.wifi_handler import WifiHandler
 from archinstall.lib.networking import ping
 from archinstall.lib.packages.util import check_version_upgrade
 from archinstall.lib.pacman.pacman import Pacman
-from archinstall.lib.translationhandler import tr, translation_handler
+from archinstall.lib.translationhandler import Language, tr, translation_handler
 from archinstall.lib.utils.util import running_from_iso
-from archinstall.tui.components import tui
+from archinstall.tui.components import InstanceRunnable, tui
 from archinstall.tui.menu_item import MenuItemGroup
 
 
@@ -107,6 +109,15 @@ async def _confirm() -> bool:
 			error(tr('Failed to upload log.'))
 
 
+class LangSelect(InstanceRunnable[Language]):
+	@override
+	async def run(self) -> Language:
+		preset_lang = translation_handler.get_language_by_name('English')
+		selected_lang = await select_archinstall_language(translation_handler.translated_languages, preset_lang)
+		translation_handler.activate(selected_lang)
+		return selected_lang
+
+
 def run() -> int:
 	"""
 	This can either be run as the compiled and installed application: python setup.py install
@@ -140,6 +151,9 @@ def run() -> int:
 
 	_log_sys_info()
 
+	# The main menu isn't shown if there's no internet, and so the user wouldn't be able to select a language if not for this.
+	arch_config_handler.config.archinstall_language = tui.run(LangSelect())
+
 	if not arch_config_handler.args.offline:
 		if not arch_config_handler.args.skip_wifi_check:
 			wifi_handler = WifiHandler()