Add matrix inversion sfg generator

Works for arbitrary real spd matrices. Closes: #137 (closed) #200 (closed)

b_asic/core_operations.py

@@ -1170,9 +1170,9 @@ class MADS(AbstractOperation):
 
     def swap_io(self) -> None:
         self._input_ports = [
-            self._input_ports[1],
             self._input_ports[0],
             self._input_ports[2],
+            self._input_ports[1],
         ]
         for i, p in enumerate(self._input_ports):
             p._index = i