Support OpenSearch (searchable directive) on Amplify Gen2

[exai-sukh]

Describe the feature you'd like to request

I would like support for an equivalent of the Gen1 searchable directive in Gen2.

Describe the solution you'd like

Searchable directive support or information on temporary alternative options.

Describe alternatives you've considered

N/A

Additional context

No response

Is this something that you'd be interested in working on?

• [ ] 👋 I may be able to implement this feature request

Would this feature include a breaking change?

• [ ] ⚠️ This feature might incur a breaking change