feat: add multi subscription support (#734)

## Description

Previously we assumed that there can only be 1 subscription per user.
However, that will soon no longer the case with the introduction of the
Teams subscription.

This PR will apply the required migrations to support multiple
subscriptions.

## Changes Made

- Updated the Prisma schema to allow for multiple `Subscriptions` per
`User`
- Added a Stripe `customerId` field to the `User` model
- Updated relevant billing sections to support multiple subscriptions

## Testing Performed

- Tested running the Prisma migration on a demo database created on the
main branch

Will require a lot of additional testing.

## Checklist

- [ ] I have tested these changes locally and they work as expected.
- [ ] I have added/updated tests that prove the effectiveness of these
changes.
- [X] I have followed the project's coding style guidelines.

## Additional Notes

Added the following custom SQL statement to the migration:

> DELETE FROM "Subscription" WHERE "planId" IS NULL OR "priceId" IS
NULL;

Prior to deployment this will require changes to Stripe products:
- Adding `type` meta attribute

---------

Co-authored-by: Lucas Smith <me@lucasjamessmith.me>

apps/web/src/app/(dashboard)/admin/users/data-table-users.tsx

@@ -8,7 +8,7 @@ import { Edit, Loader } from 'lucide-react';
 
 import { useDebouncedValue } from '@documenso/lib/client-only/hooks/use-debounced-value';
 import { useUpdateSearchParams } from '@documenso/lib/client-only/hooks/use-update-search-params';
-import { Document, Role, Subscription } from '@documenso/prisma/client';
+import type { Document, Role, Subscription } from '@documenso/prisma/client';
 import { Button } from '@documenso/ui/primitives/button';
 import { DataTable } from '@documenso/ui/primitives/data-table';
 import { DataTablePagination } from '@documenso/ui/primitives/data-table-pagination';
@@ -19,7 +19,7 @@ type UserData = {
   name: string | null;
   email: string;
   roles: Role[];
-  Subscription?: SubscriptionLite | null;
+  Subscription?: SubscriptionLite[] | null;
   Document: DocumentLite[];
 };
 
@@ -35,9 +35,16 @@ type UsersDataTableProps = {
   totalPages: number;
   perPage: number;
   page: number;
+  individualPriceIds: string[];
 };
 
-export const UsersDataTable = ({ users, totalPages, perPage, page }: UsersDataTableProps) => {
+export const UsersDataTable = ({
+  users,
+  totalPages,
+  perPage,
+  page,
+  individualPriceIds,
+}: UsersDataTableProps) => {
   const [isPending, startTransition] = useTransition();
   const updateSearchParams = useUpdateSearchParams();
   const [searchString, setSearchString] = useState('');
@@ -100,7 +107,13 @@ export const UsersDataTable = ({ users, totalPages, perPage, page }: UsersDataTa
           {
             header: 'Subscription',
             accessorKey: 'subscription',
-            cell: ({ row }) => row.original.Subscription?.status ?? 'NONE',
+            cell: ({ row }) => {
+              const foundIndividualSubscription = (row.original.Subscription ?? []).find((sub) =>
+                individualPriceIds.includes(sub.priceId),
+              );
+
+              return foundIndividualSubscription?.status ?? 'NONE';
+            },
           },
           {
             header: 'Documents',