feat: template justfile repo sdlc recipes

[buddingengineers12345]

Summary

Generated projects inherit the same repo automation and SDLC task just recipes as this meta-repository, so maintainers can run freshness reporting, root/template sync checks, PR drafting, and SDLC workflow helpers without copying commands manually.

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Changes introduced

List the key changes included in this pull request:

• feat(template): add repo automation and SDLC recipes to generated justfile

Keep this list focused and easy to scan.

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Testing

Describe how the changes were tested:

• Template-only change: Jinja additions mirror the root justfile sections; not exercised end-to-end here.
• Recommend running just ci on the meta-repo before merge.

If testing was not possible, explain why.

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Documentation

Indicate whether documentation was affected:

• Not applicable (generated justfile only).

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Related issues

Link any related issues or discussions:

• None

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Contributor checklist

Please confirm the following before submitting:

• I have read and followed the Contributing Guidelines
• Tests have been added or updated as appropriate
• Documentation has been updated where necessary
• Linting and formatting pass locally
• CI checks are passing

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Release notes

If this change affects users, please indicate whether a release note is required:

• A release note has been added
• This change does not require a release note

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Additional notes

These recipes assume generated projects include the same supporting paths as the template (for example scripts/, .claude/skills/sdlc-workflow/, and optional tasks/). They match the meta-repo layout for consistency.

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Thank you for your contribution.