⭐ feat: Expand zero-sync schema with users, teams, and Steam integration (#275)

## Description
<!-- Briefly describe the purpose and scope of your changes -->


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **New Features**
- Expanded data model to include users, Steam accounts, teams, members,
and friends lists for richer user and team management.
- Introduced detailed relationships and row-level permissions for
enhanced access control.

- **Chores**
  - Updated dependency version for improved compatibility.
- Adjusted environment variables and configuration for improved
performance and reliability.
- Updated development scripts for clearer SQL permissions generation and
workflow separation.
  - Enhanced .gitignore to exclude SQL files from version control.

- **Refactor**
- Restructured schema and permissions logic for greater flexibility and
security.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

package.json

@@ -18,7 +18,7 @@
   },
   "overrides": {
     "@openauthjs/openauth": "0.4.3",
-    "@rocicorp/zero": "0.16.2025022000",
+    "@rocicorp/zero": "0.20.2025050901",
     "steam-session": "1.9.3"
   },
   "patchedDependencies": {