🔍 Add analyzer for aws_ses_domain_identity resources

[AlexanderWiechert]

🔍 Add analyzer for aws_ses_domain_identity resources

We want to support cost analysis for aws_ses_domain_identity resources defined in Terraform plans.

This analyzer should:

• Identify all relevant Terraform resources of type aws_ses_domain_identity
• Extract pricing-relevant attributes (e.g. size, region, retention, usage-based settings)
• Use the AWS Pricing API or fallback definitions in services.json
• Report monthly cost impact for each instance of the resource

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📦 Implementation Plan

Create a new analyzer under:

resources/ses_domain_identity/
├── costs.py
├── filters.py
└── meta.py

Extract the relevant attributes for aws_ses_domain_identity from the Terraform JSON plan and calculate:

• Estimated monthly cost
• Usage-based components (if applicable)
• Tiered pricing (if applicable)

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🧪 Test Scenarios

• Minimal example with 1 resource
• Complex example with custom configuration
• Edge cases: unknown attributes, missing data

Test plans should be stored under plan/terraform-ses_domain_identity.plan.json

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🧱 Notes

• Integrate with CLI report output
• Add to README.md as a supported resource
• Update progress.md status after implementation