Add process discovery helpers and Magic facade accessors

Introduces ApplicationFinder (by name/title/handle), Magic.Open overloads, and Magic.Threads/Regions/QueryRegion accessors. Closes section 3 of add-thread-region-finder and updates tasks/comparison doc.

WhiteMagic/Magic.cs

@@ -1,7 +1,12 @@
+using System.Collections.Generic;
 using System.Diagnostics;
 using Process = System.Diagnostics.Process;
 using WhiteMagic.Execution;
 using WhiteMagic.Hooking;
+using WhiteMagic.Memory;
+using WhiteMagic.ProcessDiscovery;
+using WhiteMagic.Thread;
+using WhiteMagic.Windows;
 
 namespace WhiteMagic;
 
@@ -24,6 +29,21 @@ public sealed class Magic : IDisposable
     /// <summary>Inline-detour manager (in-process only).</summary>
     public DetourManager DetourManager => Memory.DetourManager;
 
+    /// <summary>
+    /// Returns the memory region that contains <paramref name="address"/>.
+    /// </summary>
+    public MemoryRegion QueryRegion(IntPtr address) => Memory.QueryRegion(address);
+
+    /// <summary>
+    /// Enumerates the committed and reserved regions of the target process address space.
+    /// </summary>
+    public IEnumerable<MemoryRegion> Regions => Memory.EnumerateRegions();
+
+    /// <summary>
+    /// Factory for discovering and operating on the target process's threads.
+    /// </summary>
+    public ThreadFactory Threads => new ThreadFactory(Memory);
+
     private Magic(MemoryBase memory)
     {
         Memory = memory;
@@ -31,11 +51,38 @@ public sealed class Magic : IDisposable
     }
 
     /// <summary>Opens an external process for reading, writing, and execution.</summary>
-    public static Magic Open(System.Diagnostics.Process process)
+    public static Magic Open(Process process)
     {
         return new Magic(new ExternalReader(process));
     }
 
+    /// <summary>
+    /// Opens a target process by its image name. Throws if zero or more than one match.
+    /// </summary>
+    public static Magic Open(string processName)
+    {
+        using Process process = ApplicationFinder.OpenProcess(processName);
+        return Open(process);
+    }
+
+    /// <summary>
+    /// Opens the process that owns the top-level window with the specified title.
+    /// </summary>
+    public static Magic OpenByWindowTitle(string title)
+    {
+        using Process process = ApplicationFinder.OpenByWindowTitle(title);
+        return Open(process);
+    }
+
+    /// <summary>
+    /// Opens the process that owns the specified window handle.
+    /// </summary>
+    public static Magic OpenByWindowHandle(IntPtr handle)
+    {
+        using Process process = ApplicationFinder.OpenByWindowHandle(handle);
+        return Open(process);
+    }
+
     /// <summary>Creates an in-process session for the current process.</summary>
     public static Magic OpenInProcess()
     {