Add slack time scheduling, redid earliest deadline, added max-fan-out and hybrid scheduler, also added example

Also added a couple of tests to reach full test coverage for all core operations.

Closes: #285 (closed) #284 (closed) #281 (closed)

Branched from !469 (merged) so merge that first, I can then rebase if you want to.

b_asic/core_operations.py

@@ -1123,7 +1123,7 @@ class MADS(AbstractOperation):
 
     def __init__(
         self,
-        is_add: Optional[bool] = False,
+        is_add: Optional[bool] = True,
         src0: Optional[SignalSourceProvider] = None,
         src1: Optional[SignalSourceProvider] = None,
         src2: Optional[SignalSourceProvider] = None,
@@ -1142,15 +1142,24 @@ class MADS(AbstractOperation):
             latency_offsets=latency_offsets,
             execution_time=execution_time,
         )
-        self._is_add = is_add
-        # self.set_param("is_add", is_add)
+        self.set_param("is_add", is_add)
 
     @classmethod
     def type_name(cls) -> TypeName:
         return TypeName("mads")
 
     def evaluate(self, a, b, c):
-        return a + b * c if self._is_add else a - b * c
+        return a + b * c if self.is_add else a - b * c
+
+    @property
+    def is_add(self) -> bool:
+        """Get if operation is an addition."""
+        return self.param("is_add")
+
+    @is_add.setter
+    def is_add(self, is_add: bool) -> None:
+        """Set if operation is an addition."""
+        self.set_param("is_add", is_add)
 
     @property
     def is_linear(self) -> bool: