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/eyebrow-vent/preview.tsx

@@ -13,6 +13,7 @@ import type { EyebrowVentNode } from './schema'
  * the preview doesn't intercept the cursor ray feeding the tool.
  */
 const EyebrowVentPreview = ({ node, invalid }: { node: EyebrowVentNode; 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(
     () => buildEyebrowVentGeometry(node),
     [node.width, node.depth, node.height, node.style, node.louverCount, node.backRatio],

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

@@ -55,6 +55,7 @@ const EyebrowVentRenderer = ({ node: storeNode }: { node: EyebrowVentNode }) =>
       : 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(
     () => buildEyebrowVentGeometry(node),
     [node.width, node.depth, node.height, node.style, node.louverCount, node.backRatio],