feat: Initialize Zastava Webhook service with TLS and Authority authentication

- Added Program.cs to set up the web application with Serilog for logging, health check endpoints, and a placeholder admission endpoint.
- Configured Kestrel server to use TLS 1.3 and handle client certificates appropriately.
- Created StellaOps.Zastava.Webhook.csproj with necessary dependencies including Serilog and Polly.
- Documented tasks in TASKS.md for the Zastava Webhook project, outlining current work and exit criteria for each task.

src/StellaOps.Scanner.Analyzers.Lang/GlobalUsings.cs

@@ -0,0 +1,11 @@
+global using System;
+global using System.Collections.Concurrent;
+global using System.Collections.Generic;
+global using System.Collections.Immutable;
+global using System.Diagnostics.CodeAnalysis;
+global using System.IO;
+global using System.Linq;
+global using System.Text.Json;
+global using System.Text.Json.Serialization;
+global using System.Threading;
+global using System.Threading.Tasks;