[WIP] Create custom action actions/setup-safe-outputs

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

Original prompt

Create a github custom action "actions/setup-safe-outputs". This custom action should be used in the safe_outputs job and it will write all the files needed to run the safe outputs as it is done right now in the step. When inserting the step that uses this action, it should use the local path in development mode, and use the full repository URL + release tag when the cli is running a release build.

The makefile build should populate the source files of the custom action as part of the build. They should be marked as languagegenerated in gitattributes.

The goal of this work is to drammatically reduce the size of the generated lock files by moving the javascript code into a custom action.

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[github-actions]

⚠️ Dev Hawk Report - Workflow Cancelled

Workflow: #3193

• Status: cancelled
• Commit: 31158e3

Analysis Summary

The Dev workflow was manually cancelled during execution. The agent job ran for approximately 29 seconds before cancellation.

This commit appears to be an "Initial plan" commit with no actual code changes (0 additions, 0 deletions, 0 changed files).

Job Status

• ✅ activation: success
• 🚫 agent: cancelled (during "Execute GitHub Copilot CLI" step)
• 🚫 detection: cancelled (dependency)
• ✅ conclusion: success
• 🚫 create_pull_request: cancelled (dependency)

Since this was a manual cancellation on a planning commit, no further action is needed.

🦅 Observed from above by Dev Hawk