Add initial prototype.

3-mid/physics/interface/source/physics-forge.ads

@@ -0,0 +1,19 @@
+with
+     physics.Space;
+
+package physics.Forge
+--
+-- Provides constructors for physics classes.
+--
+is
+   type Real_view is access all math.Real;
+
+
+   ----------
+   --- Space
+   --
+
+   function new_Space (Kind : in space_Kind)  return Space.view;
+
+
+end physics.Forge;