feat(e2e): #148 /newsession scenario from creation to publication

- Add NewSessionScenario that walks the Telegram wizard:
  single game, title, skip description/cover, D&D 5e, 4h, datetime,
  capacity, online format, join link, public visibility, publish, confirm
- Add ClickInlineButtonAsync / ClickInlineButtonByTextAsync to TelegramUserClient
- Add local WizardCallback/Step constants mirroring GmRelay.Shared wizard wire format
- Program.cs now runs full flow: group setup + /newsession + cleanup

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/e2e/runner/Program.cs

@@ -15,13 +15,22 @@ var config = new RunnerConfig
 using var client = new TelegramUserClient(config);
 await client.ConnectAsync();
 
-var scenario = new GroupSetupScenario(client, config);
+var setup = new GroupSetupScenario(client, config);
 ScenarioResult? result = null;
 
 try
 {
-    result = await scenario.RunAsync();
-    Console.WriteLine("Scenario completed successfully.");
+    result = await setup.RunAsync();
+
+    var newSession = new NewSessionScenario(client, config);
+    var inputs = new NewSessionInputs(
+        Title: "E2E One-Shot Adventure",
+        ScheduledAtMoscow: DateTime.UtcNow.AddDays(7).AddHours(3).ToString("dd.MM.yyyy HH:mm", System.Globalization.CultureInfo.InvariantCulture),
+        MaxPlayers: 5,
+        JoinLink: "https://example.com/join-e2e");
+
+    await newSession.RunAsync(result.Group, inputs);
+    Console.WriteLine("Full scenario completed successfully.");
 }
 catch (Exception ex)
 {
@@ -32,9 +41,8 @@ finally
 {
     if (result is not null)
     {
-        await scenario.CleanupAsync(result);
+        await setup.CleanupAsync(result);
     }
 
-    // Keep the session file written to disk.
     await Task.Delay(TimeSpan.FromSeconds(2));
 }