Daily update on 20250414-003153 by Nitload Youmu. Additional Message : Tech Issue: due to forbidden of multi-inheritance in C#, full ranslate fron EXPRESS to C# code is impossible, the EXPRESS interpreter in StgSharp will become a dialect

Add: A group of classes imported from lib https://github.com/ixmilia/step under MIT license, representing all STEP AP203 geometry objects
Change: many change to classes from https://github.com/ixmilia/step to link data interfaces to those in StgSharp
Freeze: implementation to StgSharp EXPRESS interpreter about collextion operation and element define grammer

Signed-off-by: Nitload <YoumuLiu_NSI@whv0t.onmicrosoft.com>

StgSharp.Script/Express/ExpSyntaxAnalyzer.Common.cs

@@ -113,7 +113,6 @@ namespace StgSharp.Script.Express
             }
 
             //Many thing miss here
-
             _cache.PushOperand( ExpElementMemberNameNode.Create( t ) );
 
             return true;
@@ -258,6 +257,17 @@ namespace StgSharp.Script.Express
             {
                 _cache.PushOperand( ExpInstanceReferenceNode.MakeReferenceFrom( t, instance ) );
                 return true;
+            } else if( _cache.IsLastAddedOperator )
+            {
+                if( _cache.PeekOperand( out _,
+                                        out ExpNode? typenode ) && typenode is ExpMetaRefNode typeRef )
+                {
+                    _cache.PopOperand( out _, out _ );
+                    _local.AddMember( t.Value, typeRef.SourceRef.CreateInstanceNode( t ) );
+                } else
+                {
+                    return false;
+                }
             }
             return false;
         }