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

src/ProxyInterfaceSourceGenerator/Models/ClassSymbol.cs

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+using Microsoft.CodeAnalysis;
+
+namespace ProxyInterfaceSourceGenerator.Models;
+
+internal record ClassSymbol(INamedTypeSymbol Symbol, List<INamedTypeSymbol> BaseTypes, List<INamedTypeSymbol> Interfaces)
+{
+    public override string ToString()
+    {
+        return Symbol.ToString();
+    }
+}

src/ProxyInterfaceSourceGenerator/Models/Context.cs

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+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>();
+}

src/ProxyInterfaceSourceGenerator/Models/ContextData.cs

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+namespace ProxyInterfaceSourceGenerator.Models;
+
+internal record ContextData
+{
+    public string? InterfaceName { get; init; }
+
+    public string? ClassName { get; init; }
+
+    public FileData FileData { get; init; } = default!;
+}

src/ProxyInterfaceSourceGenerator/Models/FileData.cs

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+namespace ProxyInterfaceSourceGenerator.Models;
+
+internal record FileData(string FileName, string Text);

src/ProxyInterfaceSourceGenerator/Models/ProxyData.cs

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+namespace ProxyInterfaceSourceGenerator.Models;
+
+internal record ProxyData
+(
+    string Namespace,
+    string ShortInterfaceName,
+    string FullInterfaceName,
+    string RawTypeName,
+    string TypeName,
+    List<string> Usings,
+    bool ProxyBaseClasses
+);