fix: enable yearly team pricing (#1199)

## Description

**Pending testing on preview**

Enable yearly team pricing during checkout.

## Changes Made

- Enable selecting yearly team pricing during checkout
- Update pricing on marketing to $480 for yearly team plan

## Testing Performed

- Stripe simulations

Pending manual testing


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

## Summary by CodeRabbit

- **New Features**
- Updated the savings message in the pricing table to reflect new
savings amounts.
  - Adjusted yearly pricing from $500 to $480.
  - Modified user addition costs based on subscription periods.

- **Improvements**
- Simplified button text in the Create Team Checkout Dialog to
consistently display "Checkout".

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

apps/web/src/components/(teams)/dialogs/create-team-checkout-dialog.tsx

@@ -158,7 +158,6 @@ export const CreateTeamCheckoutDialog = ({
 
               <Button
                 type="submit"
-                disabled={selectedPrice.interval === 'yearly'}
                 loading={isCreatingCheckout}
                 onClick={async () =>
                   createCheckout({
@@ -167,7 +166,7 @@ export const CreateTeamCheckoutDialog = ({
                   })
                 }
               >
-                {selectedPrice.interval === 'monthly' ? 'Checkout' : 'Coming soon'}
+                Checkout
               </Button>
             </DialogFooter>
           </div>