feat(angular): add value accessors to the directives array

[AndreasIllg-COS]

Prerequisites

• I have read the Contributing Guidelines.
• I agree to follow the Code of Conduct.
• I have searched for existing issues that already report this problem, without success.

Describe the Feature Request

Value accessors are needed to make form controls useable in angular with ngModel, formControl or formControlName.
The angular output target already copies all required value accessors to the generated components directory. But it creates a "directivesArrayFile" that only lists the proxy components. This feature request would add the value accessors to this list. Then the module file from the angular integration guide (https://stenciljs.com/docs/angular) could be used unchanged.

Describe the Use Case

When you add valueAccessorConfigs to the angularOutputTarget configuration, you can use the module file shown in the angular integration guide without changes.
Currently you have to add the value accessors to the module file, which is something that is not documented.

Describe Preferred Solution

Add the value accessor directives to the directives array, so that they are declared and exported together with the proxy components.

Describe Alternatives

Document what to add in the module file to declare and export the value acessors.

Related Code

No response

Additional Information

You still have to export the classes in the public-api file, but that is a minor documentation issue then.

[ionitron-bot]

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