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/turbine-vent/preview.tsx

@@ -14,6 +14,7 @@ import type { TurbineVentNode } from './schema'
  * doesn't intercept the cursor ray feeding the placement tool.
  */
 const TurbineVentPreview = ({ node, invalid }: { node: TurbineVentNode; 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(
     () => buildTurbineVentGeometry(node),
     [node.style, node.diameter, node.height, node.neckHeight, node.vaneCount, node.baseOverhang],

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

@@ -65,10 +65,12 @@ const TurbineVentRenderer = ({ node: storeNode }: { node: TurbineVentNode }) =>
       : undefined,
   )
 
+  // biome-ignore lint/correctness/useExhaustiveDependencies: deps deliberately list the build inputs; depending on the whole object would rebuild on unrelated field changes.
   const baseGeometry = useMemo(
     () => buildTurbineVentBase(node),
     [node.diameter, node.height, node.neckHeight, node.baseOverhang],
   )
+  // biome-ignore lint/correctness/useExhaustiveDependencies: deps deliberately list the build inputs; depending on the whole object would rebuild on unrelated field changes.
   const headGeometry = useMemo(
     () => buildTurbineVentHead(node),
     [node.style, node.diameter, node.height, node.neckHeight, node.vaneCount],