Update to Include AWS Pricing Calculator MCP

[lestersimjj]

Description

Integrates the aws-pricing-calculator-mcp-server into the migration skill so that the Estimate phase produces a shareable calculator.aws URL alongside the cost report. The advantage is that aws-pricing-calculator-mcp-server does not require AWS credentials unlike AWS Pricing MCP and it creates a shareable/editable link.

• Added aws-pricing-calculator-mcp-server to the MCP Servers section with available tools and usage notes
• Added "AWS Pricing Calculator Integration Workflow" subsection (create → discover fields → add services → export)
• Added "Cost Report: AWS Pricing Calculator Link Section" - instructions for embedding the shareable URL in generated reports
• Added "Cost Report: Discrepancies Section" - structured guidance for explaining cost differences between AWS Pricing MCP and AWS Pricing Calculator MCP (eg. rounding, EC2 utilization limitation, pricing model mismatches, unsupported services)
• Added fallback error handling when the calculator MCP is unavailable
• Updated Phase Summary Table outputs and Scope Notes

Type of Change

• New plugin/power/tool
• Bug fix
• Enhancement to existing content
• Documentation update
• Guardrail/CI update

Team Folder

• migrate/
• Other: ___

Checklist

• I have read the CONTRIBUTING.md guidelines
• My changes do not include hardcoded secrets, credentials, or internal-only content
• I have run mise run build locally and it passes
• I have updated documentation if needed
• My changes are scoped to my team's folder only