feat(v8): add support for custom domain in ImageProcessingDistribution

[fabidick22]

Issue #, if available:

Description of changes:
This enhancement allows users to configure custom domain names (e.g., images.example.com) for their CloudFront distribution by providing domain names and an ACM certificate ARN through CDK context variables.

Note: I'm not sure if this feature is in the roadmap, but I find it useful for customizing the solution. Feel free to reject this PR if you don't think it's necessary or if it doesn't align with the project's direction.

Changes

• Add support for customDomainNames and acmCertificateArn CDK context parameters
• Add new CloudFormation outputs for configured custom domains and certificate ARN

Checklist

• 👋 I have added unit tests for all code changes.
• [ x ] 👋 I have run the unit tests, and all unit tests have passed.
• ⚠️ This pull request might incur a breaking change.

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