Mitra Profil: WhatsApp + Telegram brand glyphs

Replaces the generic chat_bubble + send Material icons with the
official WhatsApp + Telegram glyphs from font_awesome_flutter. Adds
the package as a runtime dep; FA brand glyphs are CC BY 4.0 and the
package itself is MIT.

Visual style is kept consistent with the other rows (pink-soft tile
backing, brand-pink glyph fill) rather than full-brand colors —
matches the figma's monochrome tile pattern.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

mitra_app/lib/features/profile/profil_screen.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:font_awesome_flutter/font_awesome_flutter.dart';
 import 'package:url_launcher/url_launcher.dart';
 import '../../core/auth/auth_notifier.dart';
 import '../../core/theme/halo_tokens.dart';
@@ -255,13 +256,13 @@ class _MenuList extends StatelessWidget {
     return Column(
       children: [
         _MenuTile(
-          icon: Icons.chat_bubble_outline,
+          icon: FontAwesomeIcons.whatsapp,
           label: 'Chat WhatsApp Kami',
           onTap: onTapWa,
         ),
         const SizedBox(height: 10),
         _MenuTile(
-          icon: Icons.send_outlined,
+          icon: FontAwesomeIcons.telegram,
           label: 'Chat Telegram Kami',
           onTap: onTapTelegram,
         ),