feat: extract shared Cecil weaving core

Editor/Core/ShrinkWeaveResult.cs

@@ -0,0 +1,43 @@
+#nullable enable
+
+using System.Collections.Generic;
+using System.Linq;
+
+namespace ShrinkSDK.CodeGen
+{
+
+public enum ShrinkCodeGenDiagnosticSeverity { Info, Warning, Error }
+public enum ShrinkCodeGenPlatform { EngineNeutral, Unity }
+
+public sealed class ShrinkCodeGenDiagnostic
+{
+    public ShrinkCodeGenDiagnostic(ShrinkCodeGenDiagnosticSeverity severity, string message)
+    {
+        Severity = severity;
+        Message = message;
+    }
+
+    public ShrinkCodeGenDiagnosticSeverity Severity { get; }
+    public string Message { get; }
+}
+
+public sealed class ShrinkWeaveResult
+{
+    public ShrinkWeaveResult(bool changed, int instanceSubscribers, int staticSubscribers,
+        int registryEntries, IReadOnlyList<ShrinkCodeGenDiagnostic> diagnostics)
+    {
+        Changed = changed;
+        InstanceSubscribers = instanceSubscribers;
+        StaticSubscribers = staticSubscribers;
+        RegistryEntries = registryEntries;
+        Diagnostics = diagnostics;
+    }
+
+    public bool Changed { get; }
+    public int InstanceSubscribers { get; }
+    public int StaticSubscribers { get; }
+    public int RegistryEntries { get; }
+    public IReadOnlyList<ShrinkCodeGenDiagnostic> Diagnostics { get; }
+    public bool Succeeded => Diagnostics.All(item => item.Severity != ShrinkCodeGenDiagnosticSeverity.Error);
+}
+}