Add files for installation chooser

src/gtk/installation_chooser.blp

@@ -0,0 +1,6 @@
+using Gtk 4.0;
+using Adw 1;
+
+template $InstallationChooser : Adw.PreferencesGroup {
+	title: _("Choose Installation");
+}

src/gtk/installation_chooser.py

@@ -0,0 +1,7 @@
+from gi.repository import Adw, Gtk
+from .host_info import HostInfo
+
+@Gtk.Template(resource_path="/io/github/flattool/Warehouse/gtk/installation_chooser.ui")
+class InstallationChooser(Adw.ActionRow):
+    __gtype_name__ = 'InstallationChooser'
+    gtc = Gtk.Template.Child

src/meson.build

@@ -7,6 +7,7 @@ blueprints = custom_target('blueprints',
     'gtk/app_row.blp',
     'gtk/help-overlay.blp',
     'gtk/loading_status.blp',
+    'gtk/installation_chooser.blp',
     'main_window/window.blp',
     'packages_page/packages_page.blp',
     'packages_page/filters_page.blp',
@@ -74,6 +75,7 @@ warehouse_sources = [
   'gtk/error_toast.py',
   'gtk/sidebar_button.py',
   'gtk/loading_status.py',
+  'gtk/installation_chooser.py',
   'gtk/app_row.py',
   'main_window/window.py',
   'package_install_worker.py',

src/warehouse.gresource.xml

@@ -5,6 +5,7 @@
     <file preprocess="xml-stripblanks">gtk/help-overlay.ui</file>
     <file preprocess="xml-stripblanks">gtk/loading_status.ui</file>
     <file preprocess="xml-stripblanks">gtk/app_row.ui</file>
+    <file preprocess="xml-stripblanks">gtk/installation_chooser.ui</file>
     <file preprocess="xml-stripblanks">main_window/window.ui</file>
     <file preprocess="xml-stripblanks">packages_page/packages_page.ui</file>
     <file preprocess="xml-stripblanks">packages_page/filters_page.ui</file>