feat(scripts): add 46 workshop screenshots and fix capture script

[emmanuelknafo]

Summary

Captured all 46 workshop screenshots for labs 00-07 and fixed the capture-screenshots.ps1 script with Playwright auth, Phase parameter, Windows-compatible commands, and working directory management.

Changes

Script Fixes (Phase 1)

• Added Playwright auth state support with --load-storage for GitHub and Azure Portal screenshots
• Added Phase parameter (-Phase 1|2|3) with PhaseMap and Test-ShouldCapture helper for phased execution
• Fixed PSRule version command from Invoke-PSRule --version to Get-Module PSRule -ListAvailable
• Fixed Windows-incompatible cat | python -m json.tool | head -30 to PowerShell-native Get-Content | ConvertFrom-Json | ConvertTo-Json
• Added Push-Location/Pop-Location for scan commands requiring demo-app working directory
• Fixed freeze --execute on Windows by wrapping commands in temp .ps1 files
• Fixed New-LabDirectory to return absolute paths via Resolve-Path
• Fixed freeze --lines format from hyphenated to comma-separated
• Fixed PSRule scan screenshots to use Invoke-CapturedFreezeScreenshot with inline options
• Fixed Infracost file references for diff and SARIF screenshots

Screenshots Captured

• Phase 1 (29 PNGs): Labs 00-07 no-deploy screenshots (tool versions, file captures, Bicep, scans)
• Phase 2 (8 PNGs): Post-deploy screenshots (Azure Portal resource groups/tags, Cloud Custodian live scans)
• Phase 3 (9 PNGs): Post-scan screenshots (GitHub Security tab, code scanning alerts, workflow runs)

Infrastructure Lifecycle

• Deployed 5 Azure resource groups via deploy-all workflow
• Ran finops-scan workflow uploading SARIF to Security tabs
• Torn down all resources via teardown-all workflow

Related Issues

Fixes AB#2132

Notes

• lab-06-gh-api-upload.png shows a 422 error because commit_sha=HEAD is a literal string; SARIF was already uploaded by the scan workflow
• c7n-azure installation deferred due to Windows long path limit; core c7n installed