feat: Begins pressure estimation feature tests.

Sources/PressureEstimationsFeature/SharedPressureEstimationState.swift

@@ -36,7 +36,6 @@ public struct SharedPressureEstimationState: Equatable, Sendable {
     set { equipmentMetadata[keyPath: keyPath] = newValue }
   }
 
-  #warning("Needs to hold onto estimation state, so it can be editable")
   @dynamicMemberLookup
   public struct FlaggedEstimationContainer: Equatable, Identifiable, Sendable {
     public let id: UUID
@@ -92,6 +91,11 @@ public struct SharedPressureEstimationState: Equatable, Sendable {
         return name
       }
 
+      // Compare relevant values on if two states have changes.
+      func hasChanges(_ other: Self) -> Bool {
+        cfm != other.cfm || filterPressureDrop != other.filterPressureDrop
+      }
+
       public enum CFMContainer: Equatable, Sendable {
         case cfm(Int)
         case cfmPerTon(Int, EquipmentMetadata.CoolingCapacity)