Move reusable CI template out of project

[Will-thom]

Summary

• Remove the reusable CI/CD reference template from the public project repository
• Keep docs/ci.md focused on PR Maven CLI's project-specific pipeline
• Move the reusable template to the private emplates-pre-projeto repository as the source of truth

Validation

• git diff --cached --check before commit

Notes

The template was synced to Will-thom/templates-pre-projeto in commit 28abb63.

[github-actions]

Hi @Will-thom, thank you for contributing to PR Maven CLI.

I appreciate the time you spent opening this pull request. This project is intentionally shaped for focused, reviewable open source contributions, so your input helps the tool become more useful for Java and Maven teams.

A maintainer will review the context, labels, and next steps as soon as possible. If this is your first contribution here, welcome aboard.

Useful links:

• Contributing guide: CONTRIBUTING.md
• Testing guide: docs/testing.md
• CI/CD guide: docs/ci.md

Thank you for helping build a deterministic, local-first Maven failure triage tool.