Fix CI type errors by adding explicit hubtools workspace dependency

Packages importing from hubtools weren't listing it as a dependency,
relying on pnpm hoisting which didn't work in CI. Also added CSS module
declaration for plain .css imports in website .tsx files.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: cmdcolin

genark2jbrowse/package.json

@@ -4,6 +4,7 @@
   "version": "1.0.0",
   "type": "module",
   "dependencies": {
+    "hubtools": "workspace:*",
     "slugify": "^1.6.9"
   }
 }