[CAL-4727] Add Apple Pay to Stripe integration

[xbeaulac]

Is your proposal related to a problem?

I run a tutoring business, and many of my students book their times on mobile. In my experience, Apple Pay is the easiest way to pay for something online on mobile. When I learned cal.com doesn't support Apple Pay in their Stripe integration, I was disappointed.

Describe the solution you'd like

How to implement:

1. Go to stripe payment method domains.
2. Add cal.com as a domain
3. Download the apple-developer-merchantid-domain-association file
4. Put it at apps/web/public/.well-known/apple-developer-merchantid-domain-association

Figures:

Describe alternatives you've considered

You could also create a whole separate "app" in your app store for Apple Pay, but that seems like a hastle.

Additional context

I found this PR which supposedly adds Apple Pay, but it's also doing some random internationalization stuff, and isn't as targeted as this request. I just want to host the single file to use in Stripe.

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_CAL-4727