feat: persistent rules and stuff

So ugly

ref: N25B-376

src/control_backend/agents/bdi/asl_ast.py

@@ -93,6 +93,33 @@ class Rule:
         return f"{self.head} :- {self.body}."
 
 
+@dataclass
+class PersistentRule:
+    """
+    Represents an inference rule, where the inferred belief is persistent when formed.
+    """
+
+    head: Expression
+    body: Expression
+
+    def __str__(self):
+        if not self.body:
+            raise Exception("Rule without body should not be persistent.")
+
+        lines = []
+
+        if isinstance(self.body, BinaryOp):
+            lines.append(f"+{self.body.left}")
+            if self.body.operator == "&":
+                lines.append(f"  :   {self.body.right}")
+            lines.append(f"  <-  +{self.head}.")
+            if self.body.operator == "|":
+                lines.append(f"+{self.body.right}")
+                lines.append(f"  <-  +{self.head}.")
+
+        return "\n".join(lines)
+
+
 @dataclass
 class Plan:
     """
@@ -148,7 +175,7 @@ class AgentSpeakFile:
     """
 
     initial_beliefs: list[Rule] = field(default_factory=list)
-    inference_rules: list[Rule] = field(default_factory=list)
+    inference_rules: list[Rule | PersistentRule] = field(default_factory=list)
     plans: list[Plan] = field(default_factory=list)
 
     def __str__(self):
@@ -161,7 +188,11 @@ class AgentSpeakFile:
 
         if self.inference_rules:
             sections.append("// --- Inference Rules ---")
-            sections.extend(str(rule) for rule in self.inference_rules)
+            sections.extend(str(rule) for rule in self.inference_rules if isinstance(rule, Rule))
+            sections.append("")
+            sections.extend(
+                str(rule) for rule in self.inference_rules if isinstance(rule, PersistentRule)
+            )
             sections.append("")
 
         if self.plans: