Set up DynamicLibrary from plugins

PkmnLib.Dynamic/Libraries/DynamicLibrary.cs

@@ -1,3 +1,5 @@
+using PkmnLib.Dynamic.ScriptHandling;
+using PkmnLib.Dynamic.ScriptHandling.Registry;
 using PkmnLib.Static.Libraries;
 
 namespace PkmnLib.Dynamic.Libraries;
@@ -33,7 +35,24 @@ public interface IDynamicLibrary
 
 public class DynamicLibraryImpl : IDynamicLibrary
 {
-    public DynamicLibraryImpl(IStaticLibrary staticLibrary, IBattleStatCalculator statCalculator,
+    public static IDynamicLibrary Create(IStaticLibrary staticLibrary, IEnumerable<Plugin> plugins)
+    {
+        var registry = new ScriptRegistry();
+        foreach (var plugin in plugins.OrderBy(x => x.LoadOrder))
+        {
+            plugin.Register(registry);
+        }
+        if (registry.DamageCalculator is null)
+            throw new InvalidOperationException("Damage calculator not found in plugins.");
+        if (registry.BattleStatCalculator is null)
+            throw new InvalidOperationException("Stat calculator not found in plugins.");
+        if (registry.MiscLibrary is null)
+            throw new InvalidOperationException("Misc library not found in plugins.");
+        return new DynamicLibraryImpl(staticLibrary, registry.BattleStatCalculator,
+            registry.DamageCalculator, registry.MiscLibrary);
+    }
+    
+    private DynamicLibraryImpl(IStaticLibrary staticLibrary, IBattleStatCalculator statCalculator,
         IDamageCalculator damageCalculator, IMiscLibrary miscLibrary)
     {
         StaticLibrary = staticLibrary;
@@ -42,6 +61,7 @@ public class DynamicLibraryImpl : IDynamicLibrary
         MiscLibrary = miscLibrary;
     }
 
+    /// <inheritdoc />
     public IStaticLibrary StaticLibrary { get; }
 
     /// <inheritdoc />