The Witness: Change Regions, Areas and Connections from Dict[str, Any] to dataclasses&NamedTuples (#4415)

* Change Regions, Areas and Connections to dataclasses/NamedTuples

* Move to new file

* we do a little renaming

* Purge the 'lambda' naming in favor of 'rule' or 'WitnessRule'

* missed one

* unnecessary change

* omega oops

* NOOOOOOOO

* Merge error

* mypy thing

worlds/witness/data/definition_classes.py

@@ -0,0 +1,33 @@
+from dataclasses import dataclass, field
+from typing import FrozenSet, List, NamedTuple
+
+# A WitnessRule is just an or-chain of and-conditions.
+# It represents the set of all options that could fulfill this requirement.
+# E.g. if something requires "Dots or (Shapers and Stars)", it'd be represented as: {{"Dots"}, {"Shapers, "Stars"}}
+# {} is an unusable requirement.
+# {{}} is an always usable requirement.
+WitnessRule = FrozenSet[FrozenSet[str]]
+
+
+@dataclass
+class AreaDefinition:
+    name: str
+    regions: List[str] = field(default_factory=list)
+
+
+@dataclass
+class RegionDefinition:
+    name: str
+    short_name: str
+    area: AreaDefinition
+    logical_entities: List[str] = field(default_factory=list)
+    physical_entities: List[str] = field(default_factory=list)
+
+
+class ConnectionDefinition(NamedTuple):
+    target_region: str
+    traversal_rule: WitnessRule
+
+    @property
+    def can_be_traversed(self) -> bool:
+        return bool(self.traversal_rule)