add lemon squeezy as payment provider (#246)

* add lemon squeezy checkout and webhook

* add lemonSqueezy customer portal url

* Update AccountPage.tsx

* add lemon squeezy total revenue function

* update app diff

* update app diff

* add LS docs

* Update PricingPage.tsx

* add unified payment processor

* unify customer portal url

* Update paymentProcessor.ts

* update paymentProcessor logic

* update app diff to use both payments processors

* Update contentSections.ts.diff

* finishing touches

* Update e2e-tests.yml

* remove lemonsqueezy from app diff

* Update webhook.ts

opensaas-sh/app_diff/src/payment/stripe/paymentProcessor.ts.diff

@@ -0,0 +1,11 @@
+--- template/app/src/payment/stripe/paymentProcessor.ts
++++ opensaas-sh/app/src/payment/stripe/paymentProcessor.ts
+@@ -21,7 +21,7 @@
+         id: userId
+       },
+       data: {
+-        paymentProcessorUserId: customer.id
++        stripeId: customer.id
+       }
+     })
+     if (!stripeSession.url) throw new Error('Error creating Stripe Checkout Session');