Configures Tesla OpenID Connect authentication

Implements authentication against the Tesla Fleet API using OpenID Connect.

Uses a custom OIDC configuration manager to override the token endpoint.
Configures authentication services and adds required scopes and parameters.
Adds endpoints for application registration and token retrieval during development.

Source/ProofOfConcept/Utilities/Configurator.cs

@@ -0,0 +1,19 @@
+namespace ProofOfConcept.Utilities;
+
+public class Configurator
+{
+    private readonly IHostEnvironment environment;
+    private readonly IConfiguration configuration;
+
+    public Configurator(IHostEnvironment environment, IConfiguration configuration)
+    {
+        this.environment = environment;
+        this.configuration = configuration;
+    }
+    
+    
+}
+
+public static class ConfiguratorExtensions
+{
+}