Make moveflags of gen 7 plugin shared statically

PkmnLib.Static/Moves/MoveData.cs

@@ -143,6 +143,11 @@ public interface IMoveData : INamedValue
     /// Arbitrary flags that can be applied to the move.
     /// </summary>
     bool HasFlag(StringKey key);
+
+    /// <summary>
+    /// A readonly list of all flags on the move.
+    /// </summary>
+    IReadOnlyCollection<StringKey> Flags { get; }
 }
 
 /// <inheritdoc />
@@ -196,6 +201,9 @@ public class MoveDataImpl : IMoveData
 
     /// <inheritdoc />
     public bool HasFlag(StringKey key) => _flags.Contains(key);
+
+    /// <inheritdoc />
+    public IReadOnlyCollection<StringKey> Flags => _flags;
 }
 
 public static class MoveTargetHelpers