`@daffodil/*/driver/magento/auto` entrypoint for compatibility across driver versions

[joannalauu]

Feature description

We want a single source of truth for Magento driver versions to simplify version updates and to prevent version drift. To do this, we need a general entrypoint to the driver packages. At build time, Angular will resolve this entrypoint into the version-specific entrypoint that we defined in daff.json.

To do this:

• Create an empty subpackage '@daffodil/external-router/driver/magento/auto
• Modify usage of '@daffodil/external-router/driver/magento/<verison>' in commerce schematic to import from '@daffodil/external-router/driver/magento/auto' instead
• Add an exports field inlibs/external-router/package.json with the following:

{
    "exports": {
      "./driver/magento/auto": {
        "magento-2.4.1": {
          "types": "./driver/magento/2.4.1/index.d.ts",
          "default": "./fesm2022/daffodil-external-router-driver-magento-2.4.1.mjs"
        },
        "magento-2.4.2": {
          "types": "./driver/magento/2.4.2/index.d.ts",
          "default": "./fesm2022/daffodil-external-router-driver-magento-2.4.2.mjs"
        },
        "magento-2.4.3": {
          "types": "./driver/magento/2.4.3/index.d.ts",
          "default": "./fesm2022/daffodil-external-router-driver-magento-2.4.3.mjs"
        },
       "default": {
         "types": "./driver/magento/2.4.3/index.d.ts",
         "default": "./fesm2022/daffodil-external-router-driver-magento-2.4.3.mjs"
       }
      }
    }
  }

• Add tests verifying that the bundle only includes the code expected from the driver version declared in daff.json. All the other versions should not be in the bundle. These tests should be included in the workflow created in Define a daff.json that specifies driver version for angular.json #4437 that validates daff.json behavior.

Use case

No response

Prior work

Existing draft: #4424

Daffodil version

0.91.0

Additional context

No response

[joannalauu]

Relevant packages right now:

• order
• external-router