feat(pricing, utils, types): adds money amount to pricing module (#4909)

What:

- Adds money amount service / repo / model
- Adds money amount to entry service
- Adds tests for services
- Refreshes schema
- Update joiner config to include money amounts


RESOLVES CORE-1478
RESOLVES CORE-1479

Co-authored-by: Shahed Nasser <27354907+shahednasser@users.noreply.github.com>
Co-authored-by: Carlos R. L. Rodrigues <37986729+carlos-r-l-rodrigues@users.noreply.github.com>

packages/pricing/src/models/index.ts

@@ -1 +1,2 @@
 export { default as Currency } from "./currency"
+export { default as MoneyAmount } from "./money-amount"

packages/pricing/src/models/money-amount.ts

@@ -0,0 +1,42 @@
+import { generateEntityId } from "@medusajs/utils"
+import {
+  BeforeCreate,
+  Entity,
+  ManyToOne,
+  PrimaryKey,
+  Property,
+} from "@mikro-orm/core"
+
+import Currency from "./currency"
+
+@Entity()
+class MoneyAmount {
+  @PrimaryKey({ columnType: "text" })
+  id!: string
+
+  @Property({ columnType: "text", nullable: true })
+  currency_code?: string
+
+  @ManyToOne(() => Currency, {
+    nullable: true,
+    index: "IDX_money_amount_currency_code",
+    fieldName: "currency_code",
+  })
+  currency?: Currency
+
+  @Property({ columnType: "numeric", nullable: true })
+  amount?: number
+
+  @Property({ columnType: "numeric", nullable: true })
+  min_quantity?: number | null
+
+  @Property({ columnType: "numeric", nullable: true })
+  max_quantity?: number | null
+
+  @BeforeCreate()
+  onCreate() {
+    this.id = generateEntityId(this.id, "ma")
+  }
+}
+
+export default MoneyAmount