chore(): Reorganize modules (#7210)

**What**
Move all modules to the modules directory

packages/modules/payment/src/models/index.ts

@@ -0,0 +1,7 @@
+export { default as Capture } from "./capture"
+export { default as Payment } from "./payment"
+export { default as PaymentCollection } from "./payment-collection"
+export { default as PaymentMethodToken } from "./payment-method-token"
+export { default as PaymentProvider } from "./payment-provider"
+export { default as PaymentSession } from "./payment-session"
+export { default as Refund } from "./refund"