aitools install fails for GitHub Copilot with project scope (GitHub now supports repo-scoped skills)

[DST-Kasanicky]

When running databricks aitools install --agents copilot inside a project directory without specifying a global scope, the Databricks CLI aborts the execution with the following validation error:

Skipped GitHub Copilot: does not support project-scoped skills.
Error: no agents support project-scoped skills. The following detected agents are global-only: GitHub Copilot

However, GitHub Copilot officially supports repository-scoped and workspace-scoped skills. According to the Micsrosoft Blog, repository-level skills can be resolved directly from the local project root inside the .github/skills/ directory.

Steps to Reproduce

1. Navigate to the root directory of a local Git repository.
2. Run databricks aitools install --agents copilot.

Expected Behavior

The Databricks CLI should recognize copilot as an agent capable of loading project-scoped skills and write the skills into the .github/skills/ folder structure.