⭐ feat(api): Add payments with Polar.sh (#264)

## 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**
- Introduced a new subscription API endpoint for managing subscriptions
and products.
- Enhanced subscription management with new entities and
functionalities.
- Added functionality to retrieve current timestamps in both local and
UTC formats.
- Added Polar.sh integration with customer portal and checkout session
creation APIs.

- **Refactor**
- Redesigned team details to now present members and subscription
information instead of a plan type.
  - Enhanced member management by incorporating role assignments.
- Streamlined user data handling and removed legacy subscription event
logic.
  - Simplified error handling in actor functions for better clarity.
  - Updated plan types and UI labels to reflect new subscription tiers.
  - Improved database indexing for Steam user data.

- **Chores**
- Updated the database schema with new tables and fields to support
subscription, team, and member enhancements.
  - Extended identifier prefixes to broaden system integration.
- Added new secrets related to pricing plans in infrastructure
configuration.
  - Configured API and auth routing with new domain and routing rules.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

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Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

packages/core/src/common.ts

@@ -1,7 +1,11 @@
+import { sql } from "drizzle-orm";
 import { z } from "zod";
 import "zod-openapi/extend";
 
 export namespace Common {
   export const IdDescription = `Unique object identifier.
 The format and length of IDs may change over time.`;
+
+  export const now = () => sql`now()`;
+  export const utc = () => sql`now() at time zone 'utc'`;
 }