Add support for base (proxy) class (#29)

src/ProxyInterfaceSourceGenerator/Models/Context.cs

@@ -0,0 +1,15 @@
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.CSharp.Syntax;
+
+namespace ProxyInterfaceSourceGenerator.Models;
+
+internal record Context
+{
+    public GeneratorExecutionContext GeneratorExecutionContext { get; init; }
+
+    // public List<ContextData> GeneratedData { get; } = new List<ContextData>();
+
+    public IDictionary<InterfaceDeclarationSyntax, ProxyData> CandidateInterfaces { get; init; } = default!;
+
+    public Dictionary<string, string> ReplacedTypes { get; } = new Dictionary<string, string>();
+}