feat: Initial commit

Sources/Models/Derating.swift

@@ -0,0 +1,15 @@
+public enum Derating {
+
+  public struct Request: Codable, Equatable, Sendable {
+
+    public let elevation: Int
+    public let systemType: SystemType
+
+    public init(elevation: Int, systemType: SystemType) {
+      self.elevation = elevation
+      self.systemType = systemType
+    }
+  }
+
+  public typealias Response = AdjustmentMultiplier
+}