feat: add PowerShell support, non-interactive mode, account mapping, and default profile options

[frank-bee]

Summary

This PR adds significant enhancements to the AWS SSO Profile Tool:

• PowerShell support: New cross-platform PowerShell script (awsssoprofiletool.ps1) for Windows users
• Non-interactive mode: -y flag (Bash) / -NoPrompt (PowerShell) for automation and CI/CD pipelines
• Account name mapping: --map "FROM:TO" option to create shorter/custom profile names
• Default profile creation: --default <profile> option to create a [default] profile mirroring a specific profile

Changes

New Files

• awsssoprofiletool.ps1 - Full-featured PowerShell implementation with feature parity to Bash script

Enhanced Features (awsssoprofiletool.sh)

• Added -y flag for non-interactive mode (overwrites config and creates all profiles without prompts)
• Added --map "FROM:TO" option to map account names to shorter names in profile names
  • Example: --map "Infrastructure:Infra" creates InfraFooAccess instead of InfrastructureFooAccess
  • Can be specified multiple times
• Added --default <profile> option to create a [default] section mirroring a specific profile
  • Enables AWS CLI commands without --profile flag
• Improved argument parsing with proper validation
• Added trap handlers for proper temp file cleanup on SIGINT/SIGTERM
• Bash 3.x compatibility (for macOS default shell)

Documentation Updates (README.md)

• Added "Quick Start" section with one-liner installation examples for both Bash and PowerShell
• Updated usage syntax to document new options
• Added examples for account name mappings and default profile configuration

Usage Examples

Bash (One-liner)

bash <(curl -fsSL https://raw.githubusercontent.com/frank-bee/aws-sso-profile-tool/main/awsssoprofiletool.sh) \
  -y \
  --map "Infrastructure:Infra" \
  --map "Development:Dev" \
  --default "DevAdministratorAccess" \
  us-east-1 "https://mycompany.awsapps.com/start"

PowerShell (One-liner)

& ([scriptblock]::Create((irm https://raw.githubusercontent.com/frank-bee/aws-sso-profile-tool/main/awsssoprofiletool.ps1))) `
  -Region us-east-1 `
  -StartUrl "https://mycompany.awsapps.com/start" `
  -NoPrompt `
  -Map "Infrastructure:Infra","Develop:Dev" `
  -Default "BarFooAccess"

Test Plan

• macOS (Bash 3.x)
• Windows (PowerShell)
• Linux