Updated the billing provider in the environment configuration to use 'stripe' instead of 'lemon-squeezy'. Multiple changes were also made to UI components related to pricing, including better data handling for different billing tiers and enhanced visualization of selected options. These revisions aim to both enhance the user experience and ensure compatibility with the new billing provider.
This commit updates all instances of 'base' line item type to 'flat'. It modifies the BillingIntervalSchema, the validation rules for one-time plans, and the function to get the primary line item for a plan. Furthermore, it adjusts the display and filtering of line items in the pricing table component and the plan picker component. The SQL migration script and the sample billing configuration are also updated to reflect this change.
Updated the billing schema to include a more descriptive line item and an optional tiers element. Also, billing configuration was refactored and displayed more prominently in the UI. The plan feature listing now utilizes checkmarks to denote each feature and the product details are more clearly displayed.
