Add D&D location extractor

internal/modules/dnd/extract/locations/model.go

@@ -0,0 +1,15 @@
+package locations
+
+type extractionResponse struct {
+	Locations []locationResponse `json:"locations"`
+}
+
+type locationResponse struct {
+	Name       string                      `json:"name"`
+	SourceRefs []locationSourceRefResponse `json:"source_refs"`
+}
+
+type locationSourceRefResponse struct {
+	StartUnitID int `json:"start_unit_id"`
+	EndUnitID   int `json:"end_unit_id"`
+}