complex expression support for if helper

[satyajitnayk]

@jaylinski It would be great if we could support complex expression for if helper

{{#if isPaid and amount > 2000}}
{{coupon_code}}
{{/if}}

{{#if isPaid and (amount > 2000 or join_date < "2022-10-11")}}
{{coupon_code}}
{{/if}}

Any idea/suggestion 💡🤔 is welcome! 🌟🙌