AWS::Budgets::Budget - [Coverage] - Support Tags

### Name of the resource

AWS::Budgets::Budget

### Resource name

_No response_

### Description

The underlying budget service now supports tagging budget resources (https://aws.amazon.com/about-aws/whats-new/2024/05/aws-budgets-resource-tag-based-access-controls/) but CloudFormation support is not yet available.

The `AWS::Budgets::Budget` resource should support the `Tags` property, allowing tagging of budgets.

The `CreateBudget` API supports setting tags during the create operation via the `ResourceTags` parameter, however `UpdateBudget` does not appear to support modifying the tags, instead the `TagResource` API must be used to modify tags.

### Other Details

_No response_

Start by reviewing the AWS::Budgets::Budget resource coverage and the linked AWS Budgets API behavior. Compare CreateBudget's ResourceTags support with UpdateBudget and the TagResource API. Done means the resource supports a Tags property for creating and updating budget tags through the appropriate operations.

Written by the indexing model from the issue text.