refactor: move decorators into their own package

packages/runtime-core/__tests__/propDecorator.spec.ts

@@ -1,65 +0,0 @@
-import { prop } from '../src/optional/propDecorator'
-import { Component, createInstance } from '@vue/runtime-test'
-
-test('without options', () => {
-  let capturedThisValue
-  let capturedPropsValue
-
-  class Foo extends Component<{ p: number }> {
-    @prop
-    p: number
-
-    created() {
-      capturedThisValue = this.p
-      capturedPropsValue = this.$props.p
-    }
-  }
-
-  createInstance(Foo, {
-    p: 1
-  })
-  expect(capturedThisValue).toBe(1)
-  expect(capturedPropsValue).toBe(1)
-
-  // explicit override
-  createInstance(Foo, {
-    p: 2
-  })
-  expect(capturedThisValue).toBe(2)
-  expect(capturedPropsValue).toBe(2)
-})
-
-test('with options', () => {
-  let capturedThisValue
-  let capturedPropsValue
-  let capturedDataValue
-
-  class Foo extends Component<{ p: number }> {
-    @prop({
-      default: 1
-    })
-    p: number
-    // data property should be able to make use of prop
-    d: number = this.p + 1
-
-    created() {
-      capturedThisValue = this.p
-      capturedPropsValue = this.$props.p
-      capturedDataValue = this.d
-    }
-  }
-
-  // default value
-  createInstance(Foo)
-  expect(capturedThisValue).toBe(1)
-  expect(capturedPropsValue).toBe(1)
-  expect(capturedDataValue).toBe(2)
-
-  // explicit override
-  createInstance(Foo, {
-    p: 2
-  })
-  expect(capturedThisValue).toBe(2)
-  expect(capturedPropsValue).toBe(2)
-  expect(capturedDataValue).toBe(3)
-})