feat(pricing, types): add price rule operators to price calculations (#10350)

what:

- adds price rule operators when doing price calculations
- rules now accepts a key where the value can be an array of objects `({ operator: string, value: number })`
  - validation for available types of operator and value to be a number
```
await service.createPriceSets({
  prices: [
    {
      amount: 50,
      currency_code: "usd",
      rules: {
        region_id: "de",
        cart_total: [
          { operator: "gte", value: 400 },
          { operator: "lte", value: 500 },
        ]
      },
    },
  ]
})
```
- price calculations will now account for the operators - lte, gte, lt, gt when the price context is a number

RESOLVES CMRC-747

packages/modules/pricing/integration-tests/__fixtures__/price-rule/index.ts

@@ -5,6 +5,7 @@ import { SqlEntityManager } from "@mikro-orm/postgresql"
 import { defaultPriceRuleData } from "./data"
 
 export * from "./data"
+export * from "./operators"
 
 export async function createPriceRules(
   manager: SqlEntityManager,

packages/modules/pricing/integration-tests/__fixtures__/price-rule/operators.ts

@@ -0,0 +1,39 @@
+import { RuleWithOperator } from "@medusajs/types"
+
+export const withOperator = (
+  border,
+  min = 400,
+  max = 800
+): RuleWithOperator[] => {
+  if (border === "betweenEquals") {
+    return [
+      { operator: "gte", value: min },
+      { operator: "lte", value: max },
+    ]
+  } else if (border === "between") {
+    return [
+      { operator: "gt", value: min },
+      { operator: "lt", value: max },
+    ]
+  } else if (border === "excludingMin") {
+    return [
+      { operator: "gt", value: min },
+      { operator: "lte", value: max },
+    ]
+  } else if (border === "excludingMax") {
+    return [
+      { operator: "gte", value: min },
+      { operator: "lt", value: max },
+    ]
+  } else if (border === "gt") {
+    return [{ operator: "gt", value: min }]
+  } else if (border === "lt") {
+    return [{ operator: "lt", value: min }]
+  } else if (border === "lte") {
+    return [{ operator: "lte", value: min }]
+  } else if (border === "gte") {
+    return [{ operator: "gte", value: min }]
+  } else {
+    return []
+  }
+}