fix(viewer): suppress THREE.Clock deprecation warning from R3F 9.x (#215)

three.js r183 deprecated THREE.Clock, but @react-three/fiber 9.x still
uses it internally per <Canvas> mount. This floods the dev console with
noise on every page load and HMR reload.

Uses three's setConsoleFunction hook to surgically suppress only the
exact Clock deprecation message. All other three.js logs pass through
untouched, including TSL stack-trace warnings.

Safe to remove once R3F v10 stable ships (which replaces Clock with
Timer). Removal condition documented in file header.

Closes #213

packages/viewer/src/components/viewer/index.tsx

@@ -1,5 +1,9 @@
 'use client'
 
+// Must run before @react-three/fiber's Canvas instantiates new THREE.Clock().
+// See lib/suppress-three-clock-warning.ts for rationale and removal condition.
+import '../../lib/suppress-three-clock-warning'
+
 import {
   CeilingSystem,
   DoorSystem,