Modifying Permissions of an AWS::SSM::Document

### Name of the resource

AWS::SSM::Document

### Resource name

_No response_

### Description

Currently it's not possible to [modify the permissions](https://docs.aws.amazon.com/systems-manager/latest/userguide/ssm-share-modify.html) of an SSM document created via CloudFormation. This is only possible using the AWS CLI or the Management Console. The resource-type needs to support an additional parameter `Permissions` that allows a user to specify the permissions to attach to the document. This is currently supported using [Terraform](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/ssm_document).

**API:** [ModifyDocumentPermission](https://docs.aws.amazon.com/systems-manager/latest/APIReference/API_ModifyDocumentPermission.html)

### Other Details

_No response_

Start with the AWS::SSM::Document resource context and the linked ModifyDocumentPermission API documentation, then compare how Terraform exposes SSM document permissions. Done means the resource accepts a Permissions parameter and applies the requested document permissions through CloudFormation.

Written by the indexing model from the issue text.