Implement core diagnostic memory layer, execution helpers, and high-level facade slices

Implemented:
- Core: UTF-16 ReadString boundary/alignment fix, target bitness and process id on MemoryBase
- function interception: PatchManager, DetourManager, InstructionAnalyzer, MainThreadDispatcher
- Execution: BackgroundTaskExecutor, InProcessInvoker
- High-level: Magic facade, RemotePointer, async wrappers
- Discovery/external code loading/Window groundwork (PEB/TEB, pattern scanning, raw allocations, DLL external code loading, window/input)

Tests: 180 passing, 4 integration/interactive tests skipped.

WhiteMagic/Native/NativeMethods.cs

@@ -19,11 +19,32 @@ internal static partial class NativeMethods
         [MarshalAs(UnmanagedType.Bool)] bool inheritHandle,
         int processId);
 
+    /// <summary>Opens an existing thread and returns a handle to it.</summary>
+    [LibraryImport("kernel32.dll", SetLastError = true)]
+    internal static partial SafeMemoryHandle OpenThread(
+        ThreadAccess desiredAccess,
+        [MarshalAs(UnmanagedType.Bool)] bool inheritHandle,
+        int threadId);
+
     /// <summary>Closes an open object handle.</summary>
     [LibraryImport("kernel32.dll", SetLastError = true)]
     [return: MarshalAs(UnmanagedType.Bool)]
     internal static partial bool CloseHandle(IntPtr handle);
 
+    /// <summary>Determines whether the specified process is running under WOW64.</summary>
+    [LibraryImport("kernel32.dll", SetLastError = true)]
+    [return: MarshalAs(UnmanagedType.Bool)]
+    internal static partial bool IsWow64Process(
+        SafeMemoryHandle process,
+        [MarshalAs(UnmanagedType.Bool)] out bool wow64Process);
+
+    /// <summary>Retrieves the termination status of the specified thread.</summary>
+    [LibraryImport("kernel32.dll", SetLastError = true)]
+    [return: MarshalAs(UnmanagedType.Bool)]
+    internal static partial bool GetExitCodeThread(
+        SafeMemoryHandle thread,
+        out uint exitCode);
+
     // ── Memory ───────────────────────────────────────────────────────────────
 
     /// <summary>Reads memory from a process.</summary>
@@ -87,6 +108,22 @@ internal static partial class NativeMethods
         ThreadCreationFlags creationFlags,
         out uint threadId);
 
+    /// <summary>Suspends the specified thread.</summary>
+    [LibraryImport("kernel32.dll", SetLastError = true)]
+    internal static partial uint SuspendThread(SafeMemoryHandle thread);
+
+    /// <summary>Resumes the specified thread.</summary>
+    [LibraryImport("kernel32.dll", SetLastError = true)]
+    internal static partial uint ResumeThread(SafeMemoryHandle thread);
+
+    /// <summary>Returns the thread identifier of the specified thread.</summary>
+    [LibraryImport("kernel32.dll", SetLastError = true)]
+    internal static partial uint GetThreadId(SafeMemoryHandle thread);
+
+    /// <summary>Returns the identifier of the calling thread.</summary>
+    [LibraryImport("kernel32.dll", SetLastError = true)]
+    internal static partial uint GetCurrentThreadId();
+
     /// <summary>Sets a 64-bit thread context (AMD64).</summary>
     [LibraryImport("kernel32.dll", SetLastError = true)]
     [return: MarshalAs(UnmanagedType.Bool)]
@@ -134,4 +171,5 @@ internal static partial class NativeMethods
     internal static partial uint WaitForSingleObject(
         SafeMemoryHandle handle,
         uint milliseconds);
+
 }