Update Mailpit to v1.27 and add automated version updates

[AaronFeledy]

Summary

• Updates Mailpit plugin to use the latest version v1.27
• Updates supported versions to include the 3 most recent releases
• Adds automated GitHub Actions workflow for future version updates

Changes

• Plugin: Updated default version from 1.25 to 1.27 in builders/mailpit.js
• Examples: Updated version references in example .lando.yml files
• Documentation: Updated version references in README.md and docs/
• Automation: Added .github/workflows/auto-update-versions.yml for daily version checks

Test plan

• Verify plugin loads with new version
• Test basic example works with new default version
• Test advanced example works with explicit version
• Verify documentation renders correctly
• Test automated workflow (will run on schedule)

🤖 Generated with opencode

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Lighthouse	1 paths audited Performance: 96 (🟢 up 4 from production) Accessibility: 98 (no change from production) Best Practices: 100 (no change from production) SEO: 100 (no change from production) PWA: - View the detailed breakdown and full score reports

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