feat: implement retreiving widgets

- display a bottom sheet with widgets
- open widgets in a browser
- fixes in .gitignore
- Windows UWP build files

Signed-off-by: TheOneWithTheBraid <the-one@with-the-braid.cf>

lib/pages/chat/cupertino_widgets_bottom_sheet.dart

@@ -0,0 +1,40 @@
+import 'package:flutter/cupertino.dart';
+
+import 'package:flutter_gen/gen_l10n/l10n.dart';
+import 'package:matrix/matrix.dart';
+import 'package:url_launcher/link.dart';
+
+class CupertinoWidgetsBottomSheet extends StatelessWidget {
+  final Room room;
+
+  const CupertinoWidgetsBottomSheet({Key? key, required this.room})
+      : super(key: key);
+  @override
+  Widget build(BuildContext context) {
+    return CupertinoActionSheet(
+      title: Text(L10n.of(context)!.matrixWidgets),
+      actions: [
+        ...room.widgets.map(
+          (widget) => Link(
+            builder: (context, callback) {
+              return CupertinoActionSheetAction(
+                child: Text(widget.name),
+                onPressed: callback ?? () {},
+              );
+            },
+            target: LinkTarget.blank,
+            uri: Uri.parse(widget.url),
+          ),
+        ),
+        CupertinoActionSheetAction(
+          child: Text(L10n.of(context)!.integrationsNotImplemented),
+          onPressed: () {},
+        ),
+        CupertinoActionSheetAction(
+          child: Text(L10n.of(context)!.cancel),
+          onPressed: Navigator.of(context).pop,
+        ),
+      ],
+    );
+  }
+}