feat(18-01): add globalItems, itemGlobalLinks tables and user profile/setup visibility columns

- Add globalItems table with brand, model, category, weightGrams, priceCents, imageUrl, description
- Add itemGlobalLinks junction table linking user items to global items (unique per item)
- Add displayName, avatarUrl, bio nullable columns to users table
- Add isPublic boolean column to setups table (default false)
- Import boolean from drizzle-orm/pg-core
- Generate migration 0001_tough_boomerang.sql

drizzle-pg/meta/_journal.json

@@ -8,6 +8,13 @@
       "when": 1775377947759,
       "tag": "0000_thankful_loners",
       "breakpoints": true
+    },
+    {
+      "idx": 1,
+      "version": "7",
+      "when": 1775386658636,
+      "tag": "0001_tough_boomerang",
+      "breakpoints": true
     }
   ]
 }