feat: Begins room-pressure calculator

Sources/Routes/SiteRoutes.swift

@@ -56,6 +56,7 @@ public extension SiteRoute {
     case dehumidifierSize(DehumidifierSize)
     case hvacSystemPerformance(HVACSystemPerformance)
     case moldRisk(MoldRisk)
+    case roomPressure(RoomPressure)
 
     public static let router = OneOf {
       Route(.case(Self.index)) {
@@ -70,6 +71,9 @@ public extension SiteRoute {
       Route(.case(Self.moldRisk)) {
         MoldRisk.router
       }
+      Route(.case(Self.roomPressure)) {
+        RoomPressure.router
+      }
     }
 
     public enum DehumidifierSize: Equatable, Sendable {
@@ -157,5 +161,23 @@ public extension SiteRoute {
         }
       }
     }
+
+    public enum RoomPressure: Equatable, Sendable {
+      case index(mode: Routes.RoomPressure.Mode? = nil)
+
+      public static var index: Self { .index() }
+
+      static let rootPath = "room-pressure"
+
+      public static let router = OneOf {
+        Route(.case(Self.index)) {
+          Path { rootPath }
+          Method.get
+          Query {
+            Optionally { Field("form") { Routes.RoomPressure.Mode.parser() } }
+          }
+        }
+      }
+    }
   }
 }