feat: HVAC ductwork + DWV plumbing systems (#402)

Adds two new MEP node families (HVAC ductwork, DWV plumbing) built on a shared port-connectivity model. Co-authored by @sudhir9297.

packages/nodes/src/ridge-vent/preview.tsx

@@ -7,6 +7,7 @@ import { buildRidgeVentGeometry } from './geometry'
 import type { RidgeVentNode } from './schema'
 
 const RidgeVentPreview = ({ node, invalid }: { node: RidgeVentNode; invalid?: boolean }) => {
+  // biome-ignore lint/correctness/useExhaustiveDependencies: deps deliberately list the build inputs; depending on the whole object would rebuild on unrelated field changes.
   const geometry = useMemo(
     () => buildRidgeVentGeometry(node),
     [node.length, node.width, node.height, node.style, node.endCaps],

packages/nodes/src/ridge-vent/renderer.tsx

@@ -88,6 +88,7 @@ const RidgeVentRenderer = ({ node: storeNode }: { node: RidgeVentNode }) => {
       : segmentStore
     : undefined
 
+  // biome-ignore lint/correctness/useExhaustiveDependencies: deps deliberately list the build inputs; depending on the whole object would rebuild on unrelated field changes.
   const geometry = useMemo(
     () => buildRidgeVentGeometry(node),
     [node.length, node.width, node.height, node.style, node.endCaps],